1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c71c8fe33df5f22092c2d80102156ea81f959e7a13c49fe28e9567c85029dd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cff28ebc-ba47-43a1-b748-a5582c8650fd.json and https://artists.proofprofile.net/proofs/artist/cff28ebc-ba47-43a1-b748-a5582c8650fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf4848346991c2ee0e6252fec7e104a192e6972e307d41f6c6eda2447472bc0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe7ae61aa6de84a0fa08369c26d9f9c7745aa49c7309478b573ac6d42a4c703. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f7ff3df6cbb83081fd62182ee3dad9bd005cfd0c1658642ee497878bd1c9a3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7094792d2c6f93ec37a77ddddcbf75315188fd2f383874ec3d55561eb225cfca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00b351d1d6a884d7dd14260dcbc505a8ebd1833b3b168e620c0522c4d8eb57e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc190cbbf1111a0cbb6ad3e1c08d63971ed7c2c0cbc66c428f31ce8c2abc1ae5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b49777d9b9fa7f94a90774408164ce84ce0cd1e79016bf646d8231c2d38e20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d27e1726dc33e34699221667805fad2c51ef3817eb540278359694e14c55f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3027d343f075fc8039292e5614f0d94cd8495cc289f19e3dddd5cebc69476f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa631ca393c622cf58aac454350137932cea416c75757dc17337fda02436744f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90efbd43f7da78c6cb897a5ce4622e12ab3ef9053456e10429e6f1cf604d7446. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ae82c022e9ce8bc1c997d53553f0c304f124f1b9cfc4f9c299fff08b74695f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61577981c54a8b63e276618d438b01ac2ddc1546f602163ecebdb506f79a836. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf633edcc922931af8f779f93224c7b9918441f17b64d6ae0475615dd58bf9370. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206281.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6086a51a4678b937603e78111be6e7015ab84d640e42e65f25d38c343280fbb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc1e30e944c991d5c0147d29c24ddaa225bafa5a87b4222b77586d02684d750. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe86734118d9f113dd0be10aaa496e4965d55e6bd89569de0634d336db906b2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39362162482b5650c730f22a72e853cdd269e9b97e9bd2f7222f1d44880c9faa. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a440fca2a5f68d4c1356b1126174aac337de09cd81861f0402c88dde43bf8d5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d899674561489c653b4f5021f3bd6a91c122ce23b56f7bfdbeeba5fcad37fef. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ee47ef0d6fc4d37610fd290d97db367d619849b83efc7d77ec4d87cc9f7d8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fa61d2d772ed61fc3155a441892959e948d995646bf7e737cf316143b0399a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2206302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb02153efd5d112e9b21749a15677f81b313b5135368ea9855aaef61a937d688. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES91957658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab74f33e805ab98bd67b5eaa2a494019cc8ddd2b47511eba889b309c1a7982c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES91957662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc939b3b7910f279bc48d1070a3e2fb7ab4731a6b275b458368743f7eceadb8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES91957656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886048fc5e2b7c453f8732619b1c4da1714d5430f7587ce6ba714f632a6abd1a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES91957659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe186c6d0a109380de7306c2defcfbaae9c06b1dd7f1e6991998f44808b4fa1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAU2396633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf7b2f313f6f18e82ba3a0f147b057158ed36d0c52bc03cf4549e9be924e758. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2328501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e955a0917b4210a0fc2229500222bb6cc8c8a6f4e4987a1937af81a798095f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2328502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5619209af8610fbf400014d5c7408ed940bc2c4d5c96becea286e74ef7469ba0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2328503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fad107b78d32a7e465a44d89daa8e370049ff84ea8c7d6c2ac70ad8d75ebfba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32236248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a78de71e5c1844e53bf7b796637ee054501ab69b6744f9da516c4e5a408e5c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72187087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5780514b9bf494f67c41a2ba9ece195d53166d28d2a0874da602756d155e1cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN61918547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c06ac47be780b6f7bb15e5e7f335c091427a4624786dd6e394f3a5aa5e7b3a3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ61982848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b5c2c03772ac198e018c2049412a47bcb729e34e5c70033f01ddbde12f02c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6L2324924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d689e78b97af32547c009eada6dec2772d051a5e92c04edc732ea718a3b8a3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB42269911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498d280142da168d8451faecb9ffa104e80454ec8d0c2c7681534df6d3440d3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2276489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ec694e80dce0bec9588092e5ec3518800843cb99b69f3e817ee4d4368d0e16. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2276490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ebe701be03fed1046feb730b83ac80958a660865913fde9534a88d1211ae32. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2276491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6f8e21437c78b5902d29c9dc65b2d58f3ab769ba07bb173cbf390678c52645. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2276492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7c2ba08f376837f94306dadd9e855b8c2caa344668b4fe0dc62b3f26591819. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2276493.