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 0xc3df11d00b05f1635f0bbba0d4f53fcca77632e83719dc347a7645cb1b557487. 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/c63a98e0-7996-47d3-880d-41c9bea097a1.json and https://artists.proofprofile.net/proofs/artist/c63a98e0-7996-47d3-880d-41c9bea097a1.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 0x5226b08e8887a742982c181d543bac413a2b37291f148312a3f6e9b29655ef63. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ72264919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b1345d5158bde30b945b271d78969aec5b022726c3d30204156a0bf68a45e3. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZHN62258730.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08ffc73c363a644765844586111792e68a00553241967557f4140f679502b51. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTB42237688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d83fc0221647d5d19038ad227e62bb4a6f286a1b5ae397eca010d9b7650f6b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6J2499656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44802d699e8ac1b664d4c42a18dd810fe98039590d1312ae0b9aed1af8fe847. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6J2499657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdafac58f5d47c94a6371624ba6c0213cb42f926d1d93cab911b43bdc74e358. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6J2499663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be906f7024d006fba261a3324602fd4b2c54ed0d391cb42f4ddbbde72664124. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6J2496441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce9e947c8988678b0f49a322ac2fb5157339cedc58db5fe400df0918fcf3177. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6J2496444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4648fa5c8e306a71073976a316f9fbffd24ced90e989bc463f756d48276f3ec5. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/QZK6J2496445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ee455bb5179d611f4afd13dbea413c99159ae66b53d303b5e0b78e06f746a9. 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/QZK6J2496448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a337cf96ba034315b935bcd9fa8980eed373e624c77a60b61ac7e9520a8766. 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/QZK6J2496450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded164889af3793155a71d283083f0001a61c4d5db876898eb8d5dd923968a10. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTB42532169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896befe997f1f54d51449df350caf4de31d7de693b3fcbe4defc4667ab76ddf2. 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/QZTB42532170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e53c0b8d371ba7d5355cbd72a2568f352a5e3d8fc640854b443b073f6d6117. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTB42532171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aa4c31004c5bb1c6021db6ee44d6e7249b9f6b7822ea7a952688179d56b4db. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB42532172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa9c275118507430fdfd0f2e8e19699091cb9e96c59dc787257a54b246ffd19. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB42532173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673ceaf413470c6613038b3c762059dc7e3c595d23c222c0c960f2e9d6ee9bcf. 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/QZTB42532174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af32b556dd2155153e0b7a173bcfd4abfbf7e3edb0ca185cb7d4926a49fe33a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB42532178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a1645bca90f1acc9727ded13b408b8b8d7983688d7c274aec1ddcc367aca92. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZTB42532179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd712f90a5ad86149c1f4733b95160d69c6789ac9ddfb2fedcc8280317f4716d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB42532180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f966cef8512a91433eb9683af324e0111e2a38d7f345d388ae11c76e10901d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB42532181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb5a4d3806ecb93e08f63a5adfd8de1e7cc2699d4fe13d3294231edf4190bf1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB42532182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d521757f096158b4f802214b95cd82e9328a88c2c5ce4f55557eb73c1802476. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB42548888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491c918fde3f4aaea152d8d45ffaf6cbd0de375f2a1fb175e9e9b582d923bd18. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB42548892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35a2ed7ae4cd8022bfb20fb0e1f35c67e4e112be6ea7bab2bfb35db19bf1a86. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTB42548893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382fa7886ce6450a673d608daab50e06c08f26b7cd330f408562c4042c15bfa6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB42548894.