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 0x1d1d0786df83e74ae6f9bdb7ac30e52ff772e4cc545d8052ae5b21664805ce4f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8db8a2d6-d9e6-484d-840b-d6e39c2b4395.json and https://artists.proofprofile.net/proofs/artist/8db8a2d6-d9e6-484d-840b-d6e39c2b4395.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 0xb478846a3915dcce8b5766f0100318bb534150c26da4f162ac9bffb2dae900de. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPU331500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9986e43f0929d4ac6a69ac3171e60058af6cc181fb0b525176ba2222bd9856d4. 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/JPU331500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56ff418f99d9b43df6f0750fad9816fdfa660127351eed16c4c42e9601a3286. 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/JPU331500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b69c3dd0b4c71b9ec016158e967bf255f5d8951add247ccb1a0ba33b5b361f9. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JPU331500142.
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 0x69e0b69c442fc3aa0a023c8d2ef5d22c9bafc23be04f203cfa1e66154c1f6f42. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/JPU331500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e0943a635338dc065ffd26b4f43af1d71cd0680683181d82728525b694abd0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPU331500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5f8e8bff089f35ca9c9f83901bce47135f1de95bfa20bf4f0aef80f83b5fad. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPU331500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8b29eabf57e4d314184a93caa85a481dafe06605bc68a1c0dbab701b5dda62. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/JPU331500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e3250de04354a2985daccbcabc3c6fdeab47b4763bdb6e7194b9b7d68b68f8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPU331500151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f14c4eca2395b24d7523ca1cb1e6170d9c5206c217b00633747a0c45d3bd8a. 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/JPU331500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b3ee8cd0d7d89809245aa86c21f8364dc8802ace1dcf0687e4b64f13b07cba. 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/JPU331500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca7d44b56df81727f5f5e0690dcc51f05103f37a8703833a4839a9bb12a75d8. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/JPU331500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae339b500f8b8c6292a41b5b8e8ae6e12277c18655de21d2d63f3be5d3611dee. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/JPU331500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71581357419a60d3f9f29ba9647b80bd06616318a9335d24c99f08c8b8d29d0d. 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/JPU331500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686221764b89107d733d128518aa1ac4fb25bd513bc408bfff78119d55ccca86. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPU331500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5fc04eb46961e046be2d24c996fb017d754def44743db3ecaaa83b9d5ffcc2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPU331500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d147bb1dd090da4d65bdd69e5021545215f0fbcfdcb810014eace84be0c6d18. 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/JPU331500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd22419bfd751c638f4fd98f9702b32acd9936765a062fc48fcc095bb6dc480. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPU331500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e5a28aadd252ca17719c82765071d312a8a5e45e8b7fe8dc47efd6fe9bd885. 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/JPL542200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acdda8a5b7811a83b950ce10b84ef6adf57810916173f8f6a63bfd71a2ba409. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPL542200190.