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 0xf8c6650f70ce82128f30fd4206de34ec7a90b17804dc2a4e0e0e65b9bd7c2757. 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/d00340c8-2bf5-46fb-8fbf-567b89d5ba7d.json and https://artists.proofprofile.net/proofs/artist/d00340c8-2bf5-46fb-8fbf-567b89d5ba7d.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 0x8efb34ac5fd4b62ddb44646d7f384365bc457aaffc371c388a83050c15719ffd. 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/QZK6J2128593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f43b78516971c1a901332fab558d9b0facc8d0b2c133b314cca89f673806b0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6J2128594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e5714474288202e917cda1d282630b782d232407fac3111f81326dd8bb53d9. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:20:49Z), 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/QZK6J2128599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0e85107ccf73f6f3e7111df10fa82b0d13bd9b2a7974a942204ad8927d34bd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6J2128602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c55569ff2a8ae07f17e7eaf5b1fa0b4f13a2dfd6c16ff82ab3571ba77520f9d. 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/QZK6H2117911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d68225eb86daffeca5ec15656395d5437aa31783173f2a91e791beb049b811. 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/QZFZ72215258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad364094a6a4154db3b09b3629a3886167752620cc635322209284855de1fc12. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:18Z), 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/QZFZ72215260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3e17a032115e38a158bafc00627791b8133e43cbf061fe15fb0493a8e76b92. 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/QZFZ72215261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea2b7e903e706feedca7aa104427acc0cc68c581d5b1575c06e636138d782e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZFZ72215266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d8a525edd7779e962515114a2b9710117e7af402eea4b98e53a6d94aa04d55. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZFZ72208379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cf6d88f1162ac122c5627b772d0a8ca0ab8428fcb8de0deb2c2204c1a6f7f5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ72208381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f24c96b8ec03df45fe105784f4fad4aafea8795a1badce7181f62caff0b70e5. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZFZ72208387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e97fa05069523e1d6e8436472e5b3c740c9bce88108dbef3de3d5e86259db. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZFZ72208388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf4dbefb2aec6ab3ea361f439b5f5067e2b8a87a0953fc8394d800d4edd842. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:44:12Z), 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/QZFZ72208395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3048ff7eb91dde7382f8521cec79b2f888bbd83e7e73d382cdc8c3fc814fea31. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:06:20Z), 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/QZES92324156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e5d39415f4cd59a4aa0b20f46661b7a9dbae1d57c792902bd33b157d12b893. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZES92324159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2158891cd02d2b500c0e60434c434802aaac1cb7a620482035f04918fe0b3a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:06Z), 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/QZES92324161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9e72f1eb12f5c0184296d574caa307b75ae2737829575de7a0cd1eec870b6d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:55:36Z), 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/QZK6M2367973.