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 0x6dba18013e10d45eb646aaf817f48b7fb06c17575c53c9ccac7b3ecb294800c2. 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/c478c1aa-7950-46c7-9c1d-6b3fa083700d.json and https://artists.proofprofile.net/proofs/artist/c478c1aa-7950-46c7-9c1d-6b3fa083700d.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 0xf3a7b07bdb298808c17cc57e67fb3538193d8a7d91ffdd3daab67fa689ef058c. 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/ARIXB2106053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3d567ee85ef0bc3181bc74cfd472db7924848e8d51b51311439f88302f61fa. 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/ARIXB2106890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7fb0dadc60fb89c710051182a6528183603f65f4b044d99464b6dd1e086be3. 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/ARC571901585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a42bb3396a7ce683f4a99e8fc9bcd31468d44f46d683e8205b651d64d6ab50. 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/ARC571901588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27a0af14ed94bc6abd8a669a8fa8cc4f61b7cf0ec92fbf7adc9d8a9cd12a702. 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/ARC571901590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fad126fa6f2684c71ddad130495d9913527d3c6d0376fce3df84398067ba36. 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/ARC571901591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e8c6cd9e14849d5617a234b2ec49d9d916d9426567cebfcc0a2a4f59eebf3a. 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/ARC571700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f3e7f0b1ccb08b24adfb04692f5be62daf25a0511875f9aca0c57ae14b425a. 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/ARIXB2402109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2563dd51d5f39d64e89f5c4c508f9df2fc683c341681d60c6310a80ef9208cc. 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/ARIXB2401136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e6b0ed0616a3a5c47713792391f3418d6d280305a163f1f0e34fdf9780741. 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/ARIXB2303678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9e75f965a59d388c0e5c4133a5e99d3870c49765538625691496e785d3cd8f. 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/ARIXB2207063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e2450687c342812dfdd8ad85a0a8743538c9fb1a3575efc3f388a3d1228947. 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/ARIXB2100645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a295f84e5f72e526e2d3a7cf2bbdad850635ce7c2514aa4e9101172a23c73e4. 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/ART0G2003225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b73ca749b18b7e1f61773c36e2b23f280933ccced3fa292a6598b55591ac4b5. 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/ESA011856742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9ec26e6e040b1715066fffbeb63b5b74562b65db538f6e2e126a771dfe98e3. 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/ARC572000522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27a0af14ed94bc6abd8a669a8fa8cc4f61b7cf0ec92fbf7adc9d8a9cd12a702. 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/ARC571901590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fad126fa6f2684c71ddad130495d9913527d3c6d0376fce3df84398067ba36. 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/ARC571901591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e8c6cd9e14849d5617a234b2ec49d9d916d9426567cebfcc0a2a4f59eebf3a. 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/ARC571700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dfc1d185b949ee0ca9effcaeec7d96fde3dabb228ed70049c0499941da4205. 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/ARIXB2500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd71c0d77a509d0f72800b4c80b74c16970a3104d183ddea984a086e65c87731. 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/ARIXB2403653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9302c28cfe9d1fe4791140f7d2994b405108f1e3765c614aba8e3d4f402801d. 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/ARIXB2403170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9e75f965a59d388c0e5c4133a5e99d3870c49765538625691496e785d3cd8f. 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/ARIXB2207063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde62caf79b7fdc32016805d65739a8fbfcf3d1cb641686c167deba0401f2ef50. 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/ARIXB2205201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b73ca749b18b7e1f61773c36e2b23f280933ccced3fa292a6598b55591ac4b5. 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/ESA011856742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b2fb8dda55d4823e03b017e6caaff963191eb401e64297252627f8916cd229. 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/ES71G2150020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6632579c4cb93df662ea9710afcd101ab8cbffeadacd816d1e957fd804b1b728. 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/ES71G2150021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12d2be452fd765c673c4af983f00d61ecab7d7f86eccb0a61d83745fe67b101. 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/ES71G2150033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376fbd3f98a598028d57469578f63954ab22c8ebe857b1eeb3d4d5605054bb87. 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/ES71G2150024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f62cdd3b0a7a5c1398cb6da46ce04138b79891718db07be121555d66f091191. 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/ES71G2150023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed19921debc95b607de3241d5f30b13065feffd20302c2fccb4d5fed11b5ad3. 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/ES71G2150025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e3204fe0c280b0158b1ce5cff1ea453fb7bfc8807c9d1518cf4984c33e6494. 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/ES71G2150027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4273c46fd5a8fdf1f616452e8be20a2598d10ace7ef1e0681dd4c69248a702. 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/ES71G2061021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688728e6dfda8b19eec2b971e0a1771102dfc36f0708aa4af53dab837ac6929d. 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/ES71G2030441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219a953c2cfa37fa2cac8f9aa40bab7aaba971be075bdcc2ec7cdcee361f68d0. 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/ES71G2061020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbba19ec2f1f1f356f898507f2ac59405ce7dd52e7aa842cad8bb98ee7702da. 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/ES71G2050574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e206f683d75952fc06dbbc2fc6d74bb83093095da5f454c11d41d38c7b5fe8. 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/ES71G2406578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa8398fa62d8488517b366a0397f9cef52558b183766ccdf19bb0cb2f3da4ab. 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/ES71G2431201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fc87178496a17ae0cd2b6ee7276da296244193f1df8ede546c4d7e092cf1df. 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/ES71G2406331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe912f60f1e184b4c8be417218b43381f89f1e8843d2076cd1b392164d51e23a3. 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/ES71G2405165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd56264215a2d5ce9217662ca8af4867fb620365633ffc06ba4cb50432a933. 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/ES71G2320670.