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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ab896424e4f5b8a569d190c19c0a217e362eea2b92bd914e954e790ecd38e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1788e806-df17-4997-ba9e-42b15f958180.json and https://artists.proofprofile.net/proofs/artist/1788e806-df17-4997-ba9e-42b15f958180.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89e19b44d84fde177cf073300d0d92d322e2cd6caa3e5fe415b0c1306e8dea4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFU2147766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7382a5aabec09c12bb9e05f408929dfc9ad6b1682d05aa0aa525230f9ff6220. 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/TCAFU2147769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070904d66022c361e184631ec10f09ac850346f130bc6e0976ea35ef8f20e8f7. 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/TCAFU2147777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e64d25edfe6667761704ac4551e28770ca31e4d93985e8465e16962af7f7ac. 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/TCAFU2147785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd462b17b8fe36c6da7f2b517238b862a8f97a038284cd2c0381f2efe3ffd3aca. 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/TCAFU2147792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59d34f341982c43dacc1db307e74af6146241ff7ee1bdffa19940c4e457feff. 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/TCAFU2147807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9b3015da27639aa4036bae84551576708b769a85a7c55c2755e5a417ee5044. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFU2147826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12426b8903991054701d7159899f50ece4a29ade7d1a063489d586b881ab9037. 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/TCAFU2147828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efdf006439f91eebb48bf6982ec12b8c0b5cce17089435face5a9f76f0fa72f. 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/TCAFU2147830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959d5b9f8d771d9f99d5e2a4cb7ba440f5666e228b02ab87af7b469c6596719c. 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/TCAFU2147834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe089b98957c244f03e5866d5f93cb6ba99f462a1a163b1bb746ecf094e9a8d41. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFU2147841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbcb7e62d17abc448bd1bf7392dc1ae60268dbaac58a5fb9beac5aad31fcad3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:22:13Z), 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/TCAFU2147801.
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 0x197d2dcdade2d76e0df430aada6488c2df08c336bde59f91ab30282400baec7b. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCAFU2147786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5752670a6117c37dfe6d20d5b29b7ed4b1f201702c4006c6e3349be74ba81d. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCAFU2147795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74378694ad8dbddd884c90a3108011a9c4dfbd8b45409c627dfde448583016c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCAFU2147819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aff5b46dcab8b7569a58670a0a1cf1e7b9fdc101d4cf5d2f90aeb270041334. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAFU2147832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4a7f70c4aa7ea339ff0d94b4f22ae4f0eedff938aa9e662dec51dedc208f44. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAFU2147839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10592cf6ae0bc25a88e25a384c89e4ea35b8e338e2a5111f2b37d9bb09c19fc3. 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/TCACR1623750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9252042a926670324d52e4db437f9540d9c9b4d91e2ada7430f6bed720d60f. 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/TCACR1623751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4e933a460d522616ee330e8e19ba810c1f9234c51c20e081088ed3c390a1c7. 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/TCACR1623752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c89084f665b81c21d3381a67ae60fe8dda6dd5d0ec5cabc0609a673b4c77f35. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACR1623754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9758679c19239d6e72ce9f5443db7b7227d0bd406c85d90a1910f974ec212c5d. 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/TCACR1623755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211e91358d13f8769b69d265d5d09f96c43e6f6b3607346d9db6a033e3543aac. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACR1623757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec377b1dbf5f38841ed13280599ff7f275d9cee25f0f2730cbf1a508148aaa6. 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/TCACR1623758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4d1b14e4987915e22cbd8c94816272624ae46deb47ada91c502a856f860a9b. 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/TCACR1623759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4614e4de60c8fa1b9fb8de7a74df98f2b3526ef4a30eab111faa4d1e178ace3. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCACR1623762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d37c04b8ee8cc7fc9d341aa98b31c5afe363a3fc70ae01537431240e3cbebee. 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/TCACR1623764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017b6ecb7dff904eac94547eb61b94671f5a0a123db7b625c1c6679f5d4e6f9b. 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/TCACR1623765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc8ec61d6eebb48dbfbd189c9f312df36f1d4c66c1dc6a05280df2d5771e502. 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/TCACR1623766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938351c2948834c96b522606e87cd1d970dbf0926881d88c155f2697a8a4ac40. 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/TCACR1623767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452e3f16a57acbf758cbcd62bed885b5044a910bb1ef07e1d996096386084dc8. 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/TCACR1623768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc876e089795c9fd26678d44ab49a6de46b5ad7b4c80655ec27e75ff349a66c04. 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/TCACR1623769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524f5f1abdd767533f254fe723b35e84ee4532c579ea8e30780186d0675e871e. 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/TCACR1623772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644dab8a30ee3ef2326d881628efff2fef2dfbac7c081371e867e44470e4c285. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACU1685825.