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 0xa74482d8f777e01967a0b9942a5e42495fbdc7acd2ac6416c4309818508009e4. 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/c5a8c4f2-bc95-4a2c-a74c-177a7c3b45df.json and https://artists.proofprofile.net/proofs/artist/c5a8c4f2-bc95-4a2c-a74c-177a7c3b45df.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 0xee6de7a31c1be40b34fe7a39130c04acbf8855819511ddf3497174c9e653b575. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e19b3bd0ebac8bbc244f1463ee5df02c8f54d34310862972443f18709c5a43. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX7MG2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4f05b2d23e98f6cfafdd63760aa7923b5727f09428285be631a00db6ae352. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b69953a97cbf5219ff6380e936f9606b5e3fe4f47dd7b0e2f182a750e29db0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX7MG2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dea31b85ad63e96720e2d4324426a7c9609b4e8b628ed20d16ae8758f06f19b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ff77f5c1272c3089f671ee8cde17f9147a6208b60fa3f55779774bc18457b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73791f59af2e9726944cd8ee0d964f031a2e86371fbd45db10ade1ee366d99a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX7MG2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9de9e6112f1f33f3be0a8e52a08d81539dcd1ed7708b108771a737baf092fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX7MG2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b5ca1a89bc3a49eaa9c1d84448620efcf7b0505cfe95d59b90f0a8e0895b1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68d19d3e657fd7f4fddfc99d89f2942b02ba2e0ec87d085cefb8d4ed0dc7c62. 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/BX7MG2300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0015ec10294e932441e459fc4955e80de10d6b50293a5b971ba11ec1f30a85c6. 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/BX7MG2300291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c74819350061e554c77d3b81709a05b6d267f2ed214684ab923f2863ffc661c. 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/BX7MG2300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8ecc4203b9c2435602769d17ca05ba0efac79c4a5c46231d0cb06bc5d8a954. 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/BX7MG2300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5864888cd52df2143869e042a9ffafc417d916b6e02769adbc7e068006ff83. 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/BX7MG2300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b98b994642ff19caf99bbb6e5e4622bde51f966ce292417c4957abfe8ff6ca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX7MG2300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4208a05f0cd7eae0bc956ed29e0d556dd68a5f3ee60a3ec21010582b5185e34c. 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/BX7MG2300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931aca2e5e616f4e308e52ae4984c25c62367a40d30de81412ec428427dce775. 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/BX7MG2300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4623791e185ba3fa3d6147a928cfdf4acc2b985ed4035412896e2b5e68c175c. 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/BX7MG2300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a0a2451ab56c12cfcef2e3609598ea279313bd751c221c32b376648d9152e2. 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/BX7MG2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6164c273dac128bd53e24b44d3f33a4388a6cefbee0f0dc24ca16a26997428. 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/BX7MG2100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd3e899a2dfce477ea480bf567d835bff95cc3c383f6636ac7da8486cb73d87. 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/BRRGE2102525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c6c3f5622546fede14c3509dc35064c9c7a5d7bea0ee9f16de4d011dc33bb3. 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/BRRGE2102495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecf256944062d80dc0bf76ad35e7456d3a5797b5842899bd3058d4104dcd507. 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/BRRGE2102533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ac8a73d01c2c8cae492a9d79cba057f5f43837a04d337787875d706b591c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX7MG2100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8774fa0b723cbc110bb9429b907d95efcd1c15530837c803d479fc1a916478. 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/BX7MG2100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9a88d8b24bc0551d9da83de53e5965b59e5f7331c4e36a96c4fca220aedb83. 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/BX7MG2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ea417a11033f33f391b607931c1b4cb3521669fb44a281da8b20b130471cc9. 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/BX7MG2100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a72df1c7ffc18b1307e978444b09c54c6d6d3be6c7d095f448982c742db8ee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d88f360a7c9b9f5ad8337b8cbda865420c3cabba24f3f425f3d37519eae9c4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRSME2004629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a801db921815adce62ed69fe0f6ccbb15f413875f863ad0aeecb0da90743ff. 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/BRSME2004631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55404d79cd3a7672e8eb979e7898458024fe91a73dd703de7227bdbca1291f63. 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/BX7MG2500397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b98b994642ff19caf99bbb6e5e4622bde51f966ce292417c4957abfe8ff6ca. 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/BX7MG2300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebee0a2971b4b33c39d5f2326cf8308627cad9cc86c2c4b873c360dc9f29f4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX7MG2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892eaec73269a0dbe9b854f42e7aad93a82dba60b9174e552f1bb6c1cf0b9700. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deef290da9748880ca85b294e4673f20edd3791371e7ba1f028ec20be411fa7. 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/BX7MG2200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cf072cc6a9703f9a7cdb4be17e95927298263ad2586c918fa47892d32c7836. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb45340dd1da65541b417932b7331612948102903acf28cb2353a9f9e2a27b. 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/BX7MG2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a801db921815adce62ed69fe0f6ccbb15f413875f863ad0aeecb0da90743ff. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BRSME2004631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2898dffc1ca140435f6b5f19807f286f86995d38d87079c3277a2f978ee82f89. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:14:52Z), 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/BX7MG2000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662dcb8af7e408a309e638902c2987b23a73c1ef01d253bd1cf12af730f35a32. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX7MG2000087.