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 0x85a641ae9d67984a418c395799b8899af8c51761152ecad2953f4c2604b892dc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/115e4596-b426-4900-93e1-e5d6f9078191.json and https://artists.proofprofile.net/proofs/artist/115e4596-b426-4900-93e1-e5d6f9078191.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 0x9bbff82fa0054e6bb8b7616c6aa75bf84488bf45e80dea5ebc9b57df28198cb0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q51903353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac0beed3211f8b15198f98bccaf763f054bc8172221a367e76a220d5c06fab4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:56:22Z), 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/SE5Q51903869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb817b971c2ac0303e642b14aea12cafb702416d83994c8b17e3a2c4363ba1d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/SE5Q52001376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437340be9e6d46e7462ab6ef04eeb3609791097749d9caf6a453123a972538b2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE5Q52000541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2d479117d187da62057b2979e4781b58063807b271d952f7684ff04e4bf601. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SE5Q52003154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66758ccbd7fb7449c80fffe9a2117d2bdc9743c75b5f7f0db934b7c976baa08f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5Q52100900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a031f579f43bb68af8c78ef03172e21dbfdd819954fbbc16bae46f30dafa0d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5Q52101959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c18813a146d1bcdd11998c5f9ea57cf55dba96fefce4ff43ce3eea6590ae68a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UK6KW2100684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb8b2bd125b3e4ef422f2ae3cdbbe7cb3ba01a9f4dd4aa2938e8a09c8bf5bc1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5Q52101816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a0ff11748e4f2b7c418991d33f0c1794173788a77ecc1b8d76c00ed3816a3e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5Q52102797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7155c48805d511f0e2253db0804c031c8ba700cc7b91f7e8c944bdda48508f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52104091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581bac22eb83e817cc68f54e8d507b5a908985c3d21b95018d1c5a37d881de28. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5Q52200633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2eb1702d72e7e732ba39e1063b746e0e5607d6fbdd1c1e19281fc440c03e01. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:21Z), 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/SE5Q52200969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4bc756e351b67923a7cdd626d4ca6ce1cd30c24a34117095041d7a814c6dc7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:29:46Z), 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/SE5Q52202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42557be27d35b546cb0786f8a6b83f6a3c85718fdab2345755db4973e7d17401. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:43:26Z), 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/SE5Q52202382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9787f406265de7bcb671df26ff98f6f41d354f0bae036eb206acf62fd57ea8ab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE5Q52302450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252a6e286440dd25049cd9f167bbabff033d6b17780a9592f5526e75a6831391. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SE5Q52303077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ebd72a57c243767d9527dffcee72e267353d671233ccefa45d6e8c06dd899c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE5Q52303007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24146f96e2b0cfec138ff78c320f6a5b9e855552ed56d0f4154b3da8d55b1b1. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ8B2328312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae2fdc8e6c1e0476a91a84e5bfd4e6986299dcbda658e72292dc5baa6531879. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5Q52304444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c1cb720a6d89d93b85f0a4b971e6e33a8d76f8b7b5658383fb04ec0bb2ba4. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:34Z), 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/SE5Q52401298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62278ae9237f67435fae9c4f1056fe7c25b6635755e2e4977f216cd784960ae0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5Q51903037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01938730c6614bcf81a14cd1dcf279bcb939465e6baf3b01e291ca3c068cb0aa. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SE5Q52301209.
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