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 0x893ba261d530dfd586cfab35715cc258e197c019260758bd4bebc04acd4e0aeb. 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/1ce32907-12a6-4023-b372-10e5243d88f6.json and https://artists.proofprofile.net/proofs/artist/1ce32907-12a6-4023-b372-10e5243d88f6.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 0x88222dfbe4a653d231ceb2b7b3dcaf874acf7d553df75e42c28c8a7b618bc0b6. 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/QZMEN2023657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a8b937bc3a6872e6e3fea6e0310eb20ec900a849f82667bbd6c39d925b96c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6M2116373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18241607f7f8e68ee090ff201b0ccb8e2135fcc631ff31eaf04b4198a54e2ffb. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZK6M2114773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282b166bbfad10c705dd1365463f383ef46d0868802b5f074ce95f38b14ad08. 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/QZK6G2166272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd212ed357491dc62cd723e4c281b0a5b7e934439f01a9ecf11100a02e56d12db. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWT2166904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d240dba3a1367f331dbfb82aa43f7b638418b119774f7755764a3605727a07. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZFYZ2289150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb998f08c713dd60d68913bed0096975e1894825e2bdc5bc5ae43fbe47957e2cb. 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/QZFZ42247102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73aaaaca4822a5c40f7c82e6de942e7bb7091fc28b40749644b932bcf1f91d45. 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/QZTAZ2287000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1feec11825ff14f7ff4b2da4328b62b149e7bbb9e0d4a35b8b0eb6e37479bd7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA52327826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e526c94e64c3934b878466e8737beb192743dbdc0e3b3dc970f65f1e30e0b7. 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/QZES92339502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b7fc8003406edcc2bf2db97a1c5b1e2d36c4b9e9c2fe9d992a3ee385291ad8. 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/QZES92339505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c898cb1a1218abbb6d09b3fb45658897837b3c1db60e4f72eee9f6b022334a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZES92339509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b02eb60393e9a400a88d9b78c4eae210e5d72fb0c79313dcd553d1f2a770faa. 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/QZES92339510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6206b09bb03c9462c6ed041aa3daf3fae5a8782292dcff9bf8184812cbcc94b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB92351293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a821600a3f9f83c8b2b893047356b371d87d3356f6c71c8e8f467640daabaab. 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/QZDA42417748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00404f329b47f83368649b359ec98cef7d619d18bf2cfa5a6d9a8a5fe0c02b76. 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/QZDA72493711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292670e567b3dffdcc19c2a0d9a404bcc4a5edd9afaf62692c2c21c9fce9f47a. 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/QZHN42430293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a68da91ce62f3cbc1b147d23a08fd32c4ed17ad3f3c4273663fb6a5bf5f23f. 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/QZHN72497437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3f4bffdd473121d704b41fc51595cdc2471dfe57dfdde8f53b3d8f1978e7aa. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHNC2419139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffddcf292afcf36f28779d675aed4347593f85498ae289f1b66860f2926c5bc. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QZK6G2419174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54af1797ad94a6b1bd29e3b8325f18dc2f70544da5a020190cf04ccd1c065f88. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMEN2462081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8ddb1db7228e9ff449307cc0818ac7f508d66315ef7096c74f980f9e487da. 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/QZNWU2467382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db28e2b8140289d72eed6759db67b859e48f31139840cded4a7348ad7b6cdea. 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/QZNWW2443401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdfc6a04241169ab2f5cb93b4a3b17730097932ea9190c74cda61ed2ba77f81. 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/QZNWZ2466780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8699f2bcde92e4744fb42c24df52edcad5125d977d1905897d2e955b833f036f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTB82450347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe836f9ee6fe2f4b72bec0faa66c42c5db43ab08e8721308b2218ee77ef4bbe99. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZWFR2454171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1430fd64f2b5470b42df71eb9c87c75a16e311ea730d9d5133cae850e20c607. 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/QT3F32447906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee2223f64e9d681d27c5bd037ffa7312c2f634ee1f7870d7dc9142535683bac. 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/QZDA42542149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343d0b0cc478e60f1648c24ab0dd9efb895ef2074bf05c3eed15aea44b98a2cc. 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/QZES72554288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206cceca5d3c3429a757f737e88d3e2449451e85f0a77509b610131661581b27. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEM2567162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bc4203f2897f0c9ca819cccc5ac043a14be7de623eae702c6260917272b014. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFE2596024.