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 0xfa556ce5f2c5f58bb87a307aebd0aaa3e8def361e068cee1e55fe49b3ad1bcf8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1549b4c-a77f-4e73-849b-4c3eccde3dd6.json and https://artists.proofprofile.net/proofs/artist/e1549b4c-a77f-4e73-849b-4c3eccde3dd6.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 0xd092bc662e6554565c488ab3200753dfc9cb55a73b52d29a7751f40137d0ccef. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SE62M2287888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e64eabf6149e3fd94881e26d1bc45f257424a1596efb0f089fed199c9d923e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE62M2287889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd96c9202c378b4c71a65864c60cef5b143d3011efa0fde14f784b2af727bbe. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE62M2287890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56e639947cc13839fe17038948ae070ffb1cb4cfcaa50dd85a83c659fbdde70. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SE62M2287892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e2ed9be22a48a183d4feb2cbc38a29e1068d946b148906e0402238b0886fda. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE62M2287893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ee4db6c4812574fb38800016e8d5716fe68d61d164172826ee1358a86278b7. 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/SE62M2287895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b3e8943f3c8c0f4022601116971e1f8c54533d46da80cc5f0a9d5f400fb062. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/SE62M2287897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c744971ed2a42c852716c2cfd8d9ffaf6a243e85d63b9a9f92c57f062fd3563. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SE62M2287898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7faa7b9e96228598f413c3cc3eedf7fa60bdb7a42be7b3a54851678a37b9631. 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/SE62M2287900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b54e0a474f505b46f14ac24495530ce2ce09878741924bf292c3509724b7bd3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE62M2287901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bab27aa44abcecdbe0ac88d447bc3a75109b1a25091d4131fed7da77a76e61. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE62M2287902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d07f8bd8e1dc223267b5de1bfe96cd28080a575b297ef848444ab5af269c2aa. 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/SE66N2228597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32e1fa36e8968dfedd72d47879567f949723a9206aaf552bbccce9640afeeaf. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE66N2228598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeb1f941d2db9f2f1d0a1c4e613d05efc113332d2bf76403d6c67d0af2c5305. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SE66N2228599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5f927cf49c435963dc13aaacd7d7af1a5e06858e2c8b745cab4bff85665df7. 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/SE66N2228600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340c720c6c9cd368ede3058d2e7e4229ea76c32d7d727741dc47ad092210a4c5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SE66N2228601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd706c54e5779ccfabcd682c6ac79277ef0ba8ed5e34be2654aeda2f2e931149a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SE66N2228603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a842196f0ef3c81ff904100d21ab6258e7b7ac50ad1293a38015aed7ecd0e1d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE66N2228605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74e7701a3905e244c8e421d639e999ca0528847a8e3cee23a342fbc3089b965. 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/SE66N2228606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaea2dfacdc7ef832e0b6697d5a13959aedde7362cb06bbab6d5b28706a7c656. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE66N2228609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bffb26c9602574f63d5a12f297a950e45087c40117b83376261f5be6fac8a8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE66N2228611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e30a2bfdcc7757582ff9c3604a321263b598488918a686f82fac21fc691192. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/SE66N2228612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9152025f903b5a26a0a4d30c46612fb61130ca22d878059c66e7170c06b045. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/SE66N2228613.