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 0x1ce4b486694962c9e135b1644954a009fee804394e1a40d03859d4d6e77d37bf. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/caaccd48-9b62-4031-9d69-d647c4f79b4b.json and https://artists.proofprofile.net/proofs/artist/caaccd48-9b62-4031-9d69-d647c4f79b4b.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 0xd798f44d3fb755e11a385636257e290e66553fc7b174e739e73907bead2ec18b. 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/USN682533201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a999c87a814dc00f27432acbb725d91bb8b60684478ca2e5265ec8bb09f8f1e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USN682533202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4538397183238465cbb7c4e63d15dcecb432f3cd9211da6db70a32215391655. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:03Z), 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/USN682533203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c45d9488f3c3d4e51198f48ba98d36188d068164a32b57c669d76303071f6cf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USN682533204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527980f829e4230f4ce0645d55f51bbd4c859fb488244b2b2bf9d1c2bb125f0b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USN682533205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578479fa9809dc6e4e9cb4832784358a28d8682ea345422b22552902fd0d71c1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USN682533206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a05ab3a741d50313b31805572bd2806e52c5e83b36f672bcf90987277bf1445. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USN682533207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da0d89ba5ecb7249045ce8fd42b6249e7c82233a2c9fc3d3c3e98768c4a6906. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USN682533208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21000903e0aa7339372f41b66943451ca3250cf37ff093634410376471621d90. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USN682533209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5902431ccc9fd04ecf9637a7d96c295cb3756f0a3d46364070fa66b810dfedb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USN682533210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e080957e26f6ad9344814cd15f535f39b9a3eff82fc1c9905e0b78ac6c73ee9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:48Z), 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/USN682533211.