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 0xd992f2839ff71a6874a74a2012b689bd0ca3856eafbbfa3f77bc3a9371581b0f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e95c0f9b-ebe6-4ce7-8b20-f37423aeafae.json and https://artists.proofprofile.net/proofs/artist/e95c0f9b-ebe6-4ce7-8b20-f37423aeafae.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 0xee1f39ef36ece2c9888242c1ab5c350e97988b7cd0780039524e7f347bb28474. 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/US25L2100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4222c684fed90a24cda2a77c0a407f0760bcb61bc40ecf6755820cbafc56f4e6. 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/US25L2000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1f39ef36ece2c9888242c1ab5c350e97988b7cd0780039524e7f347bb28474. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US25L2100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569418f500777d98e2278a989bbba0b171fdeae37ebc7d0b0e72af49e3a291b1. 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/US2T32102634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1f39ef36ece2c9888242c1ab5c350e97988b7cd0780039524e7f347bb28474. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US25L2100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4222c684fed90a24cda2a77c0a407f0760bcb61bc40ecf6755820cbafc56f4e6. 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/US25L2000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eba10c679d577a13f8a9b2bb13b229e8aa4198f0fb4c6917627ab1659d2583. 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/US25L2000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec882c40dc34ae6716656f164d501f0fb60d3651d3d41808d9bb9813ee6f201. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US25L2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1f39ef36ece2c9888242c1ab5c350e97988b7cd0780039524e7f347bb28474. 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/US25L2100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569418f500777d98e2278a989bbba0b171fdeae37ebc7d0b0e72af49e3a291b1. 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/US2T32102634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d6c38419b9616145788566b61e295668b8b0feeaac64d23590e8bf697dd347. 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/US2T32202746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648592d2821b756b32341447fb6aad90aeaa2e9c71f95c5a08c6393d73467082. 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/US25M2100449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93377129c1904e41e9358c825e86285764d550fdbcfa6cb76447cc6af1929659. 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/US25L2200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e3c94389d83c1a1ec93be724af35628f66c007596971d8f15a712268db3f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25L2200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5990010013ad549a46b16fe6616fe7c05cd798beff4651d4670dec8807303609. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:23:53Z), 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/US25L2200232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980ac63bc5ca24440809bb5d4c714467e6056431c2cbc15e56a64790c366ee1. 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/US25L2200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae16109efb1ea6fd2bc90ff58aca73010eecbc7a4468c979cf575fd501f67288. 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/US25L2300414.