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 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 0x6dc7978946e0ebddab8e61cdf6d6b0098c12a080fb82b571b963d3215dc97496. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b981ad00-fc35-4a28-b2be-5708cde35478.json and https://artists.proofprofile.net/proofs/artist/b981ad00-fc35-4a28-b2be-5708cde35478.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 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 0x48987f6a8817982ca0739f62296eebb4cefaaccc3593173ebee7057162fc2830. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QZK6M2113263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd709df9383697316ca946400e573ab31aaa4a3c3a567e23774bec763dd420ee. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHN32170048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb298ae4e66cbb0eae4c77011b23fe5ef7569a2d46bfd3ceffd3a41ff173735. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZTLA2400599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6c9e3106f45dcc316b9867a007ddf755266d1b8e66fdfff8a7bce16087eacf. 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/QZQAY2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca5e2418457f581404df5be14b446b189047980feee8d2430b9bee0e0ce6bd7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZQAY2453380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789d11e58c488aa50b7308d57dd1807df9f39b8dc85ab6693e4ffe71f4bc6b05. 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/QZTLA2467480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481944ca55bc8963636716ec2e5e4c38172a9448046d85fbc82811241b91c637. 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/QZQAY2405183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130621d142f0c02ba6b987a8e4af0d744a1cabf6ceeff3224f53ba8c53009e81. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZQAY2423287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f3fd67c1ee5dc307db2423391285a6fd61c0182e7bb004bf34f4aff412a3fb. 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/QZQAY2488777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be38095f8d207ac770e5574a4a415f181bde327396e78170003490907a2d83c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZQAY2406245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e3f25470bf012861ca0d29155566b54430829adbb62cd43927840d552fb8a8. 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/QZQAY2412531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12db991e2319542e01e5e67829f419e376e9d09d9b2be317e415e64a82a0c3b2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZPLS2454744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be38095f8d207ac770e5574a4a415f181bde327396e78170003490907a2d83c. 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/QZQAY2406245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb298ae4e66cbb0eae4c77011b23fe5ef7569a2d46bfd3ceffd3a41ff173735. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTLA2400599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789d11e58c488aa50b7308d57dd1807df9f39b8dc85ab6693e4ffe71f4bc6b05. 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/QZTLA2467480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114cad4af426862dbc854d823b0bb1fc6cb7b09422ca97253f0303bfc65a8a50. 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/QZFZ62201561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f1269cb20ae6f2944c6b1eb7665fb68ee45e3bbababe98280ce5faa928068b. 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/UKXN22181298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6166f7ca7ddf3c01bfd56998e62ab2ae229741be7447f77e419b837bcc3a75. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES52149773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68be8f8a9730712796fe70feadad525dc5302e08c2164cd43bcdce2d0e976ddc. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDA52022585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8e35fb4fd35df1a0aa08b5d51a40d9231a492ff492f4f04312cc66f3b1a910. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/TCAEP2046046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35a7b841f429aed76221fff9099cca7d96b585ae954c09550c95034af21c721. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM4DW1826450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625c56267ceeba7112bf0060ad73783304353a3b6a6d82b96944b6377f39142b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBSMU3444679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea997cdb3478fc2dfb4992a494eabb43628ffba6ee0513a927a34a3a52735db0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZ8LD1744997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319cdf87c8e4c07f514396ac0e2c388f793f5765567fe0947dbc8c33becdbba7. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QMWZB1611335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4812843740253a826d809363b6150020252b88cf39ef7d5b4666d18743f5e11. 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/QM42K1704184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9af3b58ec7f3d1a20f226e9eefed76efb7ec2a16dd9bbb57be48150b4383dd4. 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/QZHN62541008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5a31c8ffa8a10b1f02b3c3c78bdb1ce6fa7fe35b51f7c12d659d93b6631c7. 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/QZWFM2482937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fde6d475945e826ae068064cefb24aacf178514f16e26c6bc32881cd1c75232. 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/QZHN62541009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77448335f3429b00abf180f4355d5f6399474162df303afabee2016fd6505daf. 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/QZHN62541010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a74ed4448ff385d0d825d0c8b0183f7922a4a4ae5250e131ec483ebf1381856. 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/QZHN62541011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a420611806e672be97d45480c5cc2063be242f182d44dc3b59aae31e877f5e4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHN62541012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c1d2c4b7e8f9974048ef1e91db4aacf842fe6ffd91622f4c858031dbac7939. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHN62541014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f95123b63c83fdd9178db80c445e9763ddbcd863e6cba76d843de25aba329. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6G2522962.