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 0x860b860e750a171c2aa00ddb7d8f6eee54d4268525698df81f31daddfbad265f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aff7ddc1-0a78-4648-b12c-5d42ce021592.json and https://artists.proofprofile.net/proofs/artist/aff7ddc1-0a78-4648-b12c-5d42ce021592.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 0x8dc116ae716c3a411f1c8f71c7c524f971094598c764a00c0d7f1dfbd7c40588. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:09Z), 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/ES31E2205477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfda7115e5028b0a77f363af8fa215060cc2cf38c7ef11b4497856c9cc11ee5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:58:38Z), 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/ES31E2302849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39713859c90680aaa01c2e3179fd0bb21fa698bd05bab703a87ec8957a989a2a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:35Z), 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/ES31E2302264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d47493f62d64dbe5d61a374ecf270bd2d3b8a2b02590f4483fa16112a48f05. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES31E2202623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca588dcdf072abdd7957d8725430baf954105ff327a7fb0579873aac4e2f0f6a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES31E2305498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0271d51dc62baa9f5a7932fe93631423d60f70f5b8fd7ffbe1f06a4a319714e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES31E2303009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10624c094341765ecec7ff2e55f42b3a1fe811435c18a94486b0eff5497c0194. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES31E2500853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08ec36ff9b2b3cfe05036be33362be81890ada91bb53dfd37d2c02cef365a4f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES31E2503659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7065ffb5c5409f41ebd36119df1e85846f35374e218a5d982bf2fd70751854e9. 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/ES31E2505041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec90f7008b6e57fe2a18d7af279624afa84791098fddf1d3cd71314ba063888. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES31E2505495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353d788f86f9024b85972a5d8b78a13ff190db30821a4413bbc7266a45329699. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:58Z), 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/ES31E2506390.