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 0xef2abbeaa396d7a7d0a1dc0f8dd4008784191d1831ecd4305949c54ffe2658bf. 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/37482d9d-cd40-451b-b564-134e9a6264c4.json and https://artists.proofprofile.net/proofs/artist/37482d9d-cd40-451b-b564-134e9a6264c4.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 0xe6628b9aa0fb9608c09345f94a9ed1e2517bae5d05e1bfa90fbb0460bf8bf337. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES71G2231081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54d0525a466965714f0dbe8b154d7b8ec6465561709331435558c815afb3ca6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ES71G2231085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3007571128f306072d1c78705793f54fbea4f7f7c0eb2ab76e278adac0220f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G2231086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4111399efba17d9fb82abac89c419955f518d94f511ee1c4c89818c80cd04d2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES71G2231088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7229e19cce22f818af7e6856b1fcd9c22fbb4031bea91b7e98b36e91a886fd1c. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ES71G2231089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e4595d516236b80fb11b7d260a111b62654f34198169d2ef3465b13b1a058a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G2231090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a3442d054c4a1d13997452a82f8212ffb4cd54b89d4a38bbba1788160e3f72. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES71G2231091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a280aea51d127373fc3a1901d5c461858b9bcdb09c8395a3afdb4ddb770268. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/ES71G2231093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8eff2dcb464e11db1415017859289f14637173ced807b601739acf5895ff70. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/ES71G2231094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693289320e0921620f78286ed92789a3c08f7e4fc26d01212a638ba8cfc1210c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:31:57Z), 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/ES71G2231100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280b480c0af49a80178d0548ec6f5621a29794a1da6463cf0e5352bedc42e4fe. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ES71G2231101.