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 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 0xf711c356a23d5f43f3de025fb6433b5c0a5d3b0cf981ba4d138e9463f03675d9. 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/35210516-2a44-4f24-ae89-d963e16d2482.json and https://artists.proofprofile.net/proofs/artist/35210516-2a44-4f24-ae89-d963e16d2482.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 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 0x6a261f29c5943e74e9fe398db17e401c21dcc6f779e7e31a01cd08d3dbc720c0. 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/USQY51027593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8070115b4d0ec6029024f058fe372a7d3c130ea6cd7d5952e6926673482699. 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/USQY51027594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b5a0ef9d6af2e648ff313a40ac55a1c530c6e51d7a3fbcf82552a24b7f9aa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USQY51027599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f07d82b74b7935846d44edbb5c0a61786094f0b6bf589e4431c4e7117e41f6. 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/USQY51027601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd426b295ffda9e9513ab2204d2b6e40abcc2ad8e9d311bf6f0c22915b1a39f4a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USQY51301008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6600a206656994c3b7d48f5f05532d2003b23455ede3c78b7345843581b11f5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USQY51301009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ade5d44791afa09540d51a06e9ba8bca73c30bf5686665383b0024c9be19d8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USQY51301012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ec4cf3bbf153dc6fa88567e5081b4713ed4e2f93cef08ac2e077b4c47bd894. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USQY51301013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd16ea712677aba221854cb9e84d383543c5e102cfd39f54aab3847aff9f947. 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/USQY51470990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f19bf14757ef03fe913ab84b2c5962ad1f36cd0a0ef5be2d69127909e9be1d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USQY51470993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775167ef439bd7abb0ea12c5013725a2bf58df291611b63a19c7d938576b9d9e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USQY51470996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8580b1a8ab2755dbb0c98799ef463b8b26ba9adc3565fff293c6cb8216ff96f5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USQY51594544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e5d5ea2f35b9ee9edd295713cf6e9b1fb6ec82d2385ccf8298cabc743565e4. 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/QZX882506213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c25d1987aaae1679bc5216a20f7d652fe7904dc3897bc1e79e32579d0bab0a0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZX882506215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe452a61469322cce8bebe6a1adf48205a00ecabae9c44478d198b61cf3536fb9. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZX882506219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ca426272446302ccd63e629f7105fae1d7ab6abe5fda07f09dc62a7775d7a8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZX882506222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3ca6cc263870fa20458beb7963ff0a508908927cab6d2505a5ac0f8251f51e. 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/USCGJ0870774.