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 0xfd65e5dd679ee824e7ad5412587c901117db3565613f24d87b68ddd088da2e2b. 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/b3930475-8192-4157-88a4-f8ca9e4716e8.json and https://artists.proofprofile.net/proofs/artist/b3930475-8192-4157-88a4-f8ca9e4716e8.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 0xece0befe5eca0f6e782c091d0b33c2e6de61bdb160a23da0d7e7645a9cf93f44. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:44Z), 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/QZHN72278668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95215aa6c8f1e52818210f9d220c2f5ffe6a9c6d6a1e5319f49c182baac75f30. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHN42318339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63c81ce2d1f08a7c63371150720fd9f0dbeb09f945063a14b641995ecdf8eee. 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/DEPI82321779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c70aae8c15359eb14854ab8578aa6ed066a83d9d09a94371d213e98bedb3143. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEPI82321778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc25e761a4b5596088773c7c7f86b8c1f79e240776f7a4b20d361c790dd01232. 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/CH7812400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980f0fad2962dd3b7b594156e28893d5297e29a8676add9c926f26f1f38a5fa5. 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/QZWFK2435739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe3f76f72a2aeedd54e23c04bc8b47948ff63112058103bd3a6a187a4fe63b6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFW2409526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34375337477774e61c489d5d6eba4fd5900fc82ae4439c303e1857fb1d95d8d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:22:55Z), 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/QZWFW2409527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dbf265d5fb1b7d60c1dbaefe9cfef0a9b37413783f596252b8aed842dfdfb7. 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/NL9KQ2590661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293883026cb7101c98de94b64a7934601a2a492824e114edd95bfacba303b08a. 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/DEUE22453864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fc5531b91bffe9e282f1d87a1929486d7e2cce4fd9b04221fb047f4c93a988. 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/DEUD92360345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608ef89c97ddf739e23b769997dc9375e7911c65d615c7b0cf4950b7c1a0ed88. 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/SE5BU2508034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcd8a8f2ebcf25d01d405bc2710dadee02a518614b2d6f8468371bcb99adba2. 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/CH3132400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2972ad71c7067a213a94ed998689ea738762aae838f2b73f112610d146a6c8b2. 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/DEUE12431970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96495d099fffbc94dc83442db0c7318e3091510946a2e03b1435f10238a2348. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SE5BU2508035.
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