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 0x64b501550a3365c4fab7c7d37b2d6ca5f77aed0357d08534ea26ab779a0be1fb. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02c16852-3813-4eb4-901f-82d16a229b37.json and https://artists.proofprofile.net/proofs/artist/02c16852-3813-4eb4-901f-82d16a229b37.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 0x37519eca1e0c9542714c2bd4c2c7b014829352c6e84ef0552306123627e5ccfe. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:19:46Z), 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/QM6P42506397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb5cae8659254e8b5a0bf42da82b5b88825bf931cdca375c4e52ec547b70515. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6P42506398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a4c6c947bb565ece7a2a142857ba809c26ea479fa7c08b20936bb5dd5398ea. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:49:01Z), 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/QM6P42506399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc3f6c7bfd20a842e86c7ae61b2f7d94f50c2ee14465ef5e10ae18c798a8ef6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM6P42506400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332101091e51ef33ce2f5b5e01607cab716a9dfaefc2350ce45e08b63ad63b81. 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/QM6P42506401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2bfd08a3b24c3750c6e54cb4ce7240a74bfb63bb231f9bb077e6819814f5f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6P42506403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc689daf138a8ca52234aa09eeaf92debba91fecfb07565c947b18b28cd14b0ea. 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/QM6P42506404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483fee54ff871b473208d328ed48507b9586e6728b1e3d51e3e9f0a3a8f0bc13. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42506405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad655bcf20b6279962e9d75c9cd9d14bedc507998d5de1d3b029bdc2a4251fd4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6P42506406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0302da70a71e0c16fe2b98c27eff8bd39be41c551789a9d10e2e8b422484db59. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42506407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5286c84716cf28bda38db577415600be538c33999a80913d17f34d5b2de337. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6P42506409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5e316df1a5365c98e83986dd0e4cc92fc4111469c8fd27e24dae38ff4dee12. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:24:17Z), 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/QM6P42506410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf7f07ca898752defe4308d81e77f5d3ac5813bfe09deaea1c584466ec691a5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42506411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d6450cbdbe4bf2feafff047f51e269f4de9379fc6753836ad56b365bc3b13a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QM6P42506421.