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 0x480a39424854cdfb76148dadc9523211d399cd85a589b8fd0a71a5dd216db3c8. 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/9da12f92-6775-4b92-9db3-f1d2e0c66276.json and https://artists.proofprofile.net/proofs/artist/9da12f92-6775-4b92-9db3-f1d2e0c66276.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 0xd52ccfbf6cdb59ee299d8e742f1516e54e42468151458d24251084a0d095b601. 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/INL231600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a37e9b9ea54c8b2cec11525206a13784a2f72a52fcb8f9d9c125f7186c4edb. 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/INL231600225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c78d087236c3141795ac0b6c37a83dea4f1727071032ec8a5839e37ffbd3da. 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/INL231720105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba3449fc97619408a2e57269ca050c1ed4a7a646cb458c815b2b3b4cf2c1a69. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INL231800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4599cb6236eb3c3917c6339e23ba85d595b7f1e3921b620f7fca52a8290866. 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/INL231909329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73db9090e1b2f4dc409e98eca70e2142853139f0090930377cedb7b352dce161. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DGA052286397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70f2ee3e14e08f0b51c2a67511bf0be40e2353ecf3a23dacaef4209f2a15769. 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/FRX762188627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e84741a0371493f1aac00d290a02d2a07c5991814078552d6f60fcdbf3bff8. 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/FR2X42133553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99a52b9d42b8f780c06670ad744d34e428d3416e2171f9f6737bcec1301bf5d. 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/FR10S2203089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc882bad094a5e5034a6a753c034187f24c54d0c53ff368dd9e6e6ad99a2763. 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/FR10S2202000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21bbe83d3ca8f60ef3a778132f1ab2e9b297a694a845fd550adceaf62e7ad5d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/INL239018092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc480d4b2148256fdd2df954a63bcc243708dee986bf72131ffe13de76927e1da. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR96X2278199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e49ae1de7b2476a19759a37a531c6ab6e55aec5ba719b0d5d2afbb7c380714c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR96X2272787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91b3cd8f9b4055c72f28f82c7fb8f2c0f87873fc4cae3380321d8caea89277b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR96X2278924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61577bca0a3c256763a062a6b329c06d1b97a297c9a2d3b42eb975a5e6b16db. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/FRX872285083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9bad34c303f81f40b4f93fff09a4d16c38f15bfbcaa605f396fddc7b026210. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/FRX452326242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f673dea29c1b3d04d051d33976cde71ca80432fee8aaa4b995e9153aece7a25. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/FR59R2393597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1895cec749fcb54c174e3d3e1f250eab2450ae23902a6ad13030b0cb66e6867. 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/FRX872431125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e7c739dde53cb512b01b4dc4b0c95b1fb522745042c6d33f21ef2eb1ea33db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0Q2411593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f8393d66fe5b8f81243d66700360a80efe2a8fda961107e3598ad622143c59. 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/FR2X42414197.