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 0x0b22165e33368186da3dc6ab2f5c465d2df479fe449b3d8d19a1db49cf356e3a. 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/96f3bcd5-cb26-4dea-8c07-aede0f646afb.json and https://artists.proofprofile.net/proofs/artist/96f3bcd5-cb26-4dea-8c07-aede0f646afb.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 0x9c437d30f892f327845438b515cdb4cdc57b4db0c675ad420b4807cef4bf6680. 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/GBUM71900992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883529136328d8cb9503965c4a17035ebea03f919fe3cef724185f70f52e22ca. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/GBUM71900989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0893a250f3f60de56eebb292e0a8ae1cf2c3a0aa550260b460ad48e572daf7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:55Z), 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/GBUM71900990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0b4bae9cac309a3b03934eaf28c431315ff14a7ee0a7c7aab836d902402e3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM4TX2108665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f95cf1b5b30bc3ed9205ff3fc2c723ca431dc7a7ea02cc156a1c72ed9e4014. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM4TX2108604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbfdcacdb04b9b9b1b7e300d6af9a78ffe8f5999a13d922f84dd44585797e20. 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/QMB622220105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf745b826b514ca58625508dc11e2847ba7500818d464d66b7ddd2f2d56e0b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMB622321306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7e9ced080d9e13c313ea299d05351ea27952b585625da763b72e6d12cb17b1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMB622321304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19c3a821861a2406bf785a4c9e79a48638715ff0312ab22e05bdc422acf6a3e. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QMB622321305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a17f4eba9b8ec46e374d02ba033ac8fa1adb2cea06ddb716df55bfbd73dfdbb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMB622321309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab13ba1cd3adbefdc49f4dede95e40cf165331fe4fe23c062e373aa5595cda6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMB622422203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa25dbaf895baeac04883cad23b00128c281398b0b6983eece5d50b4debe7cc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMB622422201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae7a0eae49fbb71401ab8ce36176fbdf4d652a143e9647100399090b59c2cb0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:02:02Z), 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/QMB622422204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6365810e5effab63a3d77426d14848a34af181be0e3a9f0e58ba9eda4eeff0bb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMB622422205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613c73bf4265ab82720445e72d61c068d034aeff997e34e902a59a17ab45701b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:56Z), 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/QMB622422216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fc38317dd804e31b8c29e066dc4d36c8f17e575c0f774f84c3a2fba76a29b2. 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/QMB622422220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf336cc4c831ae562f3f32fab257eaaa8c310cd2ed5ea782cca43f17be9dba1e2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMB622422701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc009f0371012fe7cea074971b49415e8e3708dca3eee645dd43d1dae450a5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMB622422704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8971a0bf5f1c0b004b4da0d4a0a8928144f07c4b205c643b40dde19f3b127. 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/QMB622422703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90097447db3a19b47ef4480decc9d6b5ff16defd4f8c147cb59315d25355cde5. 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/QMB622422702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406de3d49fa9988dc98401d06f5c4abf96d9abd755a1114ea05ae6782a0f0474. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBCPZ2423558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132ef668b1eb112a6b655d8d90cbff1e454df85d68d7e752ed72985508ccd4ac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAN112100456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132ef668b1eb112a6b655d8d90cbff1e454df85d68d7e752ed72985508ccd4ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAN112100456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddbfff2e58d4ae3a6e9bfb5d3f11ffb88ca4b01ef75ab2a114eecff1ee0300d. 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/ZA56E2416566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2469c455782ad80ca033508e44119b40451ab1cf22479bbc2fbb6802ddda0119. 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/FR9W12464217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2469c455782ad80ca033508e44119b40451ab1cf22479bbc2fbb6802ddda0119. 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/FR9W12464217.