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 0x60094463bf9e7e00420a028779b753593542f0013a087a52e3fa0303afb8b18e. 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/832c8867-fbb8-4898-9c8f-70232ade8190.json and https://artists.proofprofile.net/proofs/artist/832c8867-fbb8-4898-9c8f-70232ade8190.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 0x1fd8b9edcf0d0dfcc8d66a91cd03c8cadfb1f7abb7eed6623f39ce78226cc5b5. 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/QZFZ62305951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394be1ad95282ccfdc352c57e8e05c64f9bfb3bbdc35052dcade943770e12b08. 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/QZFYX2394929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1c41e33d640a66f59c5a138c57d4a71ceb2514e89fd22db9f0b6f92c0d6b2a. 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/QZFZ62305952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47fb9246c7180ec29374e06529e93a082fbeca552a87677d4817721ef23987. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:52Z), 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/QZFZ22398414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94c4c8f111c89b12998c9805467ce583ed698f5c46ac1b09520a9bbd37d7ed7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:07Z), 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/QZES52370373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a297ac97f0be2f8eb11a93ad7fbadb6b154e381bf01620a61b2d673ad4d3865. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWR2380985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a016114870572285dc0b4bacd392d8a140cca277b55fc1e296bbef6224c55e2. 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/QZNWR2380987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09335dd57558e5fbf89f7be3abf80593a1326727caf3a5943c8eb68e72827da7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWR2380988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac96ef9df5b3a9104310e3030bb18771d22eaf4d245d00dea09afddca2699998. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAS2382077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986b423b891df1af08adf1e881c27bd6a0302fb439e99e4a5e7a465164880348. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAZ2361943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2bb7e1a7bc70d369a8cc9d4cf7077df72f97f3afcbb435f1f52742e40ddd5f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB72379151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5170931eebac9710160e53830a2812c6571c54aec60a49bc8f3039dcdb6b994e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZDA82454206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9625622cea13c5468014bbe779e49c2b835b7f0cb119a0db49c28d73a98af302. 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/QZW9K2423777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b151f8661bae744cc848610f11a1cf69bc5a108080d1ba37068fbed96c9b90. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:36Z), 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/QZTPX2421751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f65864dc4da9281fdd1bb30f65ae27b5ecc4bf6e22fe8b883bad8cd488e3203. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9L2430547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8e044b5789eda065530e7756f669c5137b27a32d0d3ca4e66b81c73fc1c7f8. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZHN92286411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622cbe72c06939470ab00da374f63ab9d43051348a7398bc5d4b62c19ebd12af. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJW2528429.