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 0x96af58af702320cdd246e565332cd7e631ad57eef4104a222709083e12e22bb9. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf39cca1-1fb1-4951-9387-c6c164ee8738.json and https://artists.proofprofile.net/proofs/artist/bf39cca1-1fb1-4951-9387-c6c164ee8738.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 0xb726176e8c9ce51e02e6efbbe4d5655bf2c65d53f481947280bf1ad5dfa0b586. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES6100678062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734659de4fb19761c532ecfa70d65285e01511cb8e9e576fa13956cf5e405761. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES6100678055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68f3de204796689d29626a479ea6069f1d6b7e8c71bc59cb7caba0664fe600a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES6100678063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393adc1967716517741da4e960987102e4773e6f9db4c7626e789d18368e61f1. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/ES6100678056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686f84f71c1d0651570a08451994d39b55f0b9d0c8a22fe3095fa0aa7d62c527. 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/ES6100678057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d60ed91232fa1909eb9be04ff49517a470874faeabc657e0469054002e3c9be. 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/ES6100678064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3772887eda107afdde594db71db22a3fe77166c0e6d98382f163004b0c48e127. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES6100678065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f23bd556bca9de375a66d725004bbfedd1070fe8df977d934457fc7cf069b9. 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/ES6100678058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272f88dc6db62f4934905e0d326b3cd8df347023a250026fd6f75eae93e0adda. 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/ES6100678066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600355745bfd05eef015f81fca72676e86946be7dd803afef6d472203391db7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ES6100678059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2e125b3ca457f7d58b1f1f666ff390475eeb24f335928b8f1a0ff0feebdde. 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/ES6100678060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451a48e233d3f2ee52ff75a60f9ae034684ff6573163e0f1829b452798d81e07. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ES6100678067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e7ea9d483bdc3d14abc0fdbcbfd5dbb649ceca7aa7bc7323b7e49f810fccaf. 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/ES6100678061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc70b15372791a515eac64459c5ca195df01481de47e019dc2d6143a92b616a. 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/ES6100678069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce95d7cfc484993f66d02a464a01478f5e5709f9fced9a7dc8d5039220733d6. 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/GBMEZ1545069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b950fe95d679e2deab9304a2548700ab57fc96e6fdb95ea5f6ad507eb642dd. 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/GBMEZ1545078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2697847e222b7f0069e6bfe8b08f5faff698feefe31a41382425db31a01a6887. 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/GBMEZ1545079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbe514c2eb0a309c6da903eee0b0b84125e1c3e145019d98f9950b320bd496d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBMEZ1545072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979390c2339c0f12fadcb6e16a940e9bd34af5f4fbf2cb1b1874a0bb049b3919. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBMEZ1545083.