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 0x622b96598dd0227b1f5eef69f5d7f2e0fef94b7d0a2eca04420b044564542302. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbeea794-6c79-454f-a43a-632c16a7daf8.json and https://artists.proofprofile.net/proofs/artist/cbeea794-6c79-454f-a43a-632c16a7daf8.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 0x26c21ce718e213a18819d818732f3cdc9a1626f095f22636a4fd612d7fdbc10b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAU2141468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d6ffbe50d9f754630d229afd7b9b2222f3432429860b964fb981243b49988. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:15Z), 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/QZDA82268789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79c31d6f6939c25c86e745074cee11ece342224d9818b682e6ac050a72d5ddb. 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/QZHN52288678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba96fc9bf1f1f9efc76a97db302e9739a47c155995c8a619d41d7dc2f444e34. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZMEN2221617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe431ccf647b8ebb742ae1e521bd77589241da4e3801e1fddec57876ef462683e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNWZ2267024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5932c06e8e316348ca4cabe047ec062d2321c3de5cfacdf54fdeed9269768c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMEN2321528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75f7abc95676ce167fac54ab934e49a423f994e0a17e575871538a0adf592da. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZNWX2371562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d81607e5ba0b7b528fd4f49695c1018a709b7ade26c85e3f5c44925dd0de891. 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/QZWFJ2467960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d8fa95104f91c989d710286deafcfff8f7349ef63d65d3024489114ca6cb58. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFJ2467962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1946bf826a4a34469add8ab8e0439cdae903539ba453a67531308efada496b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6M2384933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1834f54d45e032c1cf4f648a7ecef76f30225f3f6e7c35367775e23a11e1b1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFJ2467963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641ed0fc7651e1bf14f7e2a75ec2adeb80971b71345e07a3c1495e28efe7e833. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFJ2467964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088fe77ad000c3f740b3786d3d55a3ceba78ee42800ca64da97e53852006673b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFJ2467965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088fe77ad000c3f740b3786d3d55a3ceba78ee42800ca64da97e53852006673b. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZWFJ2467965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2667329913705009ce73e61d5dfe5fba303acf6bab9191e6cc269b6337197203. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFJ2467958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5932c06e8e316348ca4cabe047ec062d2321c3de5cfacdf54fdeed9269768c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:50:47Z), 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/QZMEN2321528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72360a2c4fbad235bae8afcda3cf226f6c6e7dfe967967f564257a834f3b64b9. 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/QZWFJ2467961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348d1cd5364f596c0cf70cf1eaa008c2341ac55afde7d8f8f8b830c64f8539b7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:16Z), 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/QZZ762570264.