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 0xffc0535080c1d903e2e223d22df743ab491b1f9ad45c0139ea57d0fd94830b2e. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f447f2e-b586-4eb0-b59d-8520fdbd50eb.json and https://artists.proofprofile.net/proofs/artist/3f447f2e-b586-4eb0-b59d-8520fdbd50eb.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 0x0d7ce9e1141432421d81073dc43e69500698ced9bac65b1b6e738b7656c0b8c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CALVP2455383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cc48c326b996fc1d666bc58ac1c3cd7056b21e10b4513758ae5e78d14ffe54. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CALVP2492895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bd4a469b84647bca0f6e7959482b2a8a3b3f457344b93a05403f131d3a1504. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/CALVP2492902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d807ca2942a963c227ff785df45ce84f9ba54f74439a3c58a8a4fc4124a903. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CALVP2492909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc797a6d1d92f9dabdd238292b2f32bc43ee4b096901bfe62c19b5f92a732b043. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:51:55Z), 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/CBF8B2434903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd870cb4a7251167024a0baa7bcbb7c92c8a73a5b9ff9766af0217cefe7587d4f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CACWV2586344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286de10e0a4319b9065a3dd8a9ac8c469ca9d8768caa93517023cdcd20e6fd59. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAGOO2501107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16abbb091c9912f8069310238eee533b6dba0e0b8ec64b71c96c62a648534298. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CAGOO2501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dd1c5fda1d45a2c85f302a4d8784abedd5a435add0edafb7b540c1ea2a64eb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAGOO2501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aea45ec2425d7b088fac4723ea62f9766a5e1080a0681b2df6280d2813f310. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAGOO2501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16abbb091c9912f8069310238eee533b6dba0e0b8ec64b71c96c62a648534298. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/CAGOO2501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfb18a4d530b8131f7f2ad341d01d740403a4398206dde3c9cb82fcab947c2f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CBEYJ2570051.