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 0x2435fc3a33efe80f1d786b50de845466dc7b90aa80ba7b7392b3abf4f2f85a17. 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/29f5c337-86fc-4f2b-bf4f-b59bafa5d10d.json and https://artists.proofprofile.net/proofs/artist/29f5c337-86fc-4f2b-bf4f-b59bafa5d10d.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 0xa615d80c9ecd91ff444f5f628a9fe83950bdb536f0ee805cd244b9f727cbea62. 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/IL5840403445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda929b37484544397c5b5afff0dfe5b6052f0ee73ba17fd0f59a0940f9d96c4. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/IL5841409839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad1d3c50fc7963c473fa5dda38b265dcd73f31dff9384d6b34adbbcd6ddeb9f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/IL5841409845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8197e6958cce9f75cfabfcb62844712b8e9daa5dcd3ee28ff73818b76bf43c91. 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/IL5841409846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf753e7e4bab96dadec3c6baa4df69eb8dd628cc6d8c0a7b0d532363b900d3d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/IL5841409828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82805c1ce0d5352ef1d7fecac39caf24d1e8e4fec6ec21ffec5de8a4ef2014f9. 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/IL5841416646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf6a9f85b7bcdddaf7714fdc3a4f2619cec5d01be64365eabb498c0c82165e7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/IL5841416648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdccaec9c75ad21d2c6276eef9d1e982a7605ffb70bb4502066f9ebf164b6a. 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/IL5841416649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd965663a72b0f524e0ebb14451448cd51d7d96108ecc376f6ae4fc3ed2952730. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/IL5841416650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a20a6ef55e33f99395e789c6345892ef40b02e65f6162c2dca902dd33effe2a. 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/IL5841416651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73dc4400d7fe40100ea2de917093073368b4b048689f94a2222abcc43329330. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IL5841416653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcdfd208b5a5fd43ba0d84f2d69c30a22f68ffef64130f8ec6619f12ff60118. 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/IL5841416654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef3a55b462e2a5019a5ce6c8227f3aa55b26254fc74e8651c6e3b088f6bfe2c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/IL5841416655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f29d07b7798e3d20673db84e4dc1e2acece651344c67d39a80db2473bb87134. 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/IL5841416656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a248833fee1b55672e92f10a1010741aed7cf2a66d4b1a6c395b9fe9e9778. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/IL5841416657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1cff59159bc35e6c856ba7b14e81a57cc1f55ae1e27b65bb1aff91cb6ae383. 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/IL5841416658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d35f993e7c6cea0994e85d7d8e405d1ec069f26e5ef799a0dc2e852cd8b3d4. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/IL5841416659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c7846e39af6329f8113235150b7555b6ff227bf388681ade6c66b420755455. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/IL5841618053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74fb2422918f6874a06958edee26109cad9e0ba285b4903ea00cdcb4b0076a. 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/IL5842029647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15dc45ca49de8ff8ce8bdaaac41592032bb64b80e16d90a49ca146e312f390d. 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/IL5842030139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f95500e9bfac0c28b18e25949e88e8ead44a6b713ed5407fe2606ab3946020e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/IL5842031041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5855cbbce0df1db101901de880c3f6e71392e0a5f147245712ac6af57eeffc0f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/IL5842235954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979fa0858ab1ff12b0bb454db735558362c9844745078087f619c30ef70832d2. 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/IL1011125178.