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 0x004f82e5753d6999a313d365184c742551306117d6dbda146ca492896bcce219. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da28e95f-051e-4ad4-8a82-e7faef3d3ebf.json and https://artists.proofprofile.net/proofs/artist/da28e95f-051e-4ad4-8a82-e7faef3d3ebf.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 0x811b7c03288da12f84ac72ec8c4599a864ed6b5350fd936b181abaf5325e041f. 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/SEUM71501590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fe11589721a447d5e31efd59a890c556bcca8de1cafd626615bb9440a7f56e. 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/SEUM71501591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6f82f8eb743031ef771523d7110db7be551e6dfb5e32c7048e9d5882ff4d8. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/SEUM71500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8e35af6c21dec2b543ff65539a59d78c0ead6a9c6e3c23a5dc7a6aab72613. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEUM71501668.
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 0xc2066f14fa97c013b2bd006a07e0a5d84031791a63af96854665aa83faef146d. 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/QZ8LD1770128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a2a3df60275793f1090f321cfbc6bdb90cdf333f58fcbf1437e00d8e9144e4. 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/QM2PV1798285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec3b0835b7f0476e1201d9522f3249ca6bd67b0e998144826d49bcda58cb8c5. 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/QZ4JJ1786523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6b69184f989618c04315f7aa0e3d616cae35615593d9e524cb88ca847bca6. 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/QZ4JJ1782650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5feb3c0152b2ec22ccfdd57d8bb5710a325d730ebcb9f18fdc13c61cb36b94. 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/QM4DW1649931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b855b583742c5deaa3051981b241d475891aa1bbcfaf3a75f328a913de8730. 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/USE831508189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b4eb026a69f1db5d19b6602ff0af4d9a9267553ccde818ef8350eed4f25c49. 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/USE831505644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569c23151cee46ebdf1abcc4dc9db33640247620d6de5f96e69977dc851e18d9. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:46:50Z), 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/UST8K1559017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b741a69c933fb80b1e79087cdc7d334a0fb0b20e42c8c822b0d3b736a253630. 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/QMPKX1464198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6b678f58e5cb3399b498e70ec0378e2b144d26fef30066b0441cf6402c2774. 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/QMPKX1464201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c0312b9cdfc100c39cbd3f7cdfc9155399434ec52ee18826c118e59ea71b1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:31:31Z), 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/QMPKX1464199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592a25aa0bc8069c809a2e2de3313291104ea61b5f4bc6f4ef2036ec0122154e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMPKX1464200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65b162981726c680b06e8b16ac483325f1f18435d0fe4fe3db5eaf948c7a918. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMPKX1464202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf293c5b3529456a4c796ef448b1539b82d2dea635a3bd37fcf0f008f1bb48b24. 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/SEUM71401292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c70bbec1be875b308dbe2d659f78fa6e07c91e9d3c35b0a96e4f0eaa0a341c7. 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/SEUM71401293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2d9de793e2345e6559019f89e5c5295653ff81c1cadabd0829c864ac1062a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:11:09Z), 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/SEUM71401294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6844dd0b013611361585da544322976261b5d5b24a8f1c74688bc30b244544f. 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/SEUM71401295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c85f664a4d3d6e8e1a564f28333a913ba1775297f4212eea966ce3649152269. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZBRF1887240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b6fcf338a0e853223e061f1ae4e0e845e078918c350d51adad3da3d2399447. 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/QZBRF1887241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf915dc47c172cd72bd528e9423c4730177ca42badef0f726c0d533082fb91c73. 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/SEUM71402216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ea493f44a68f8f376deee56bda3f8a2453b67e286b4d70093281b4a57ed32f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SEUM71402217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558792700eab81492092899630589a8c7193918d76399421f2aea7a31d1008dd. 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/QZHN52017116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd557bc5ed41ff06bdf61e32f8cb233444d57968a1516b9336a97894dfd4891d5. 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/QZK6P1992076.