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 0x8720f029639f8914a6869cdd64b575b90a8275c355a56ab7dbd33a9aa17fd503. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11d244c9-e854-4877-b128-24abbf4dd798.json and https://artists.proofprofile.net/proofs/artist/11d244c9-e854-4877-b128-24abbf4dd798.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 0xb80a1666461b1c51f6c63e56e908072e156de32c1c8252a6f8848f5595794869. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARMSV2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9850f51542a67e618a05eec2e6834106e66177961b5ca24a5b1f294bad9ff97. 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/ARMSV2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b612de1bb4f59af5b67371191053394857a6766de532cdaa8b116fb0a1f84e3. 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/ARMSV2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020ad78078ece8cc46f241385ef16373d1e86a5e7277e08344b5793c4ddaa59d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARMSV2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afb4c7a21aa11eecd6f896a6ffbf9ce10c898bdb2cf1c827cfd3100ed5e2d9b. 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/ARMSV2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cdad6676c576bf543430c821b3586ea4c7c8ef0a086edb36997f387d879308. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARMSV2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015232b65146ac14b80798d67f8d162561f9f0c047347da1e1de200683804d97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARMSV2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cf29b654bd854ec6db59d92c8567a79bef51ccbc242d55b8c3d6825e9b04c5. 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/ARMSV2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc408cb120744648ad42254eb406b8bfed3348317abab9c3860db1f783e09d83. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARMSV2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9126fb9c89efaa63104de06e3452a566fb9d78056c82b4b89ff6bf53af883cac. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARMSV2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6da156534a6e37933d0a3a1b79613411e6c9e1b918e71bc83d116a8d951cf1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ARMSV2400040.
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 0x86b3e1a130367bc4307c3d326c8ab2e7ed8580e04fbeed594efa319ea0efea9a. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ARMSV2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1d45c558edb08aebb3376cff3a0ae0f3735f622b271c838a30f63a1e5294ef. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARMSV2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68883a0e07fbac503fa42ed7525941ba6a19f866b781ffdfb2bba95ab58d19ac. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:29Z), 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/ARMSV2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfc4f91209b9b0c6d8805c5618e7cc2ba971889d003a01e13288f22e63e280e. 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/ARMSV2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e4490ceddfcbd9dfb5fe3b8229925650715b59f5cfd07588f6bd1e4c874854. 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/ARMSV2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a9714400dc324b2e55775e47fcc033e2d368c394a607fcb0488257491aca86. 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/ARMSV2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771fc199ee51fd595b0b92444b48fd49eca34824d6376a47cd051cf680eb83d8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ARMSV2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ea072443d3adce2688e146599441d965004852a86296dc6601b415b2a54b77. 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/ARMSV2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac30d6c394491a9faf6026d6446d4e87307cf058358ab45cc2c30d8c559093c1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARMSV2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55243ed7f703e7ce82e766c6127ebff03d2c49cf3cf062e85dfb9b7db8d3e644. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARMSV2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e7b765e566e0bae8635ae79716f76d9bc19b03b9147ecc6e450e465bd0070d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ARMSV2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d9f99488ded2e4aaf129011cfa0611410dd7507b36b212554a4b167af641cf. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:23Z), 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/ARMSV2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e42b00a2477a9c54c2ea266a537964f016fc067edf938ff0c6534db4e39aef6. 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/QZWDE2433298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc93c4d7b48da650413eadc91f9a0463a6c407f04bb2a503fbec2f13bec62f8b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAX2322621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a73e33efdff301eb486cf92263b1c7ed3459f350567804e6eca9dcdda30c5ce. 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/QZZ8A2408784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcfb4e93b9553539fcd2359add830b88f0c0dac644ff56285119a22bfa3a1ab. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTRX2475955.