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 0x616ef9c36b113a6105637f122ec0dc0ac709e82a6decbf15cc0270ef3f0649da. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eb11d74-6bf0-4e74-b1c0-ab724237b6ec.json and https://artists.proofprofile.net/proofs/artist/0eb11d74-6bf0-4e74-b1c0-ab724237b6ec.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 0x2559d9dc38825ed4f8a768535e01c8d5bc6abdac90db01fdae8e6ae3cebe8ab6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:56:15Z), 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/QZNB82558960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442688bdda82c618e547344eeca3e2c578ba1d95ff6e52bad2c73ff0dbb16075. 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/QZNB82558961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e540a8cb8171d58e3ea422047f087cd69ab4213784088deaca6acd74dad0232. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:35:46Z), 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/QZNB82558962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213fb509300254247c0fcbc1a94cafee25eb59b87b10ec2400da503298892e14. 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/QZNB82558963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7e83beed85ec3ec9734fcb280e2200e8b7527db5da51961cb535bc1a400a14. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNB82558965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b04ef5358710dd1d28584f07646c2e437a7d4202fd5fcafc362db75d5a8efa0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:16Z), 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/QZNB82564423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6856853d12e8de370ac7058078e8754bca8bc1d4e98ad18bd3b9a5e204b3c636. 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/QZNMT2555683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ab6eef79afd6328d2e0847ae1df984cfa2a506e5c5d398f8b9f30901aaf0ba. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT6EB2575768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95ec56c058ff784d64c8a83e3d869077e9d5a8f605cc29b932c7da2fb31b998. 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/QT6EB2572593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeb67f6869a603d0b985f9618bc66e65c7a1a623b293918d2ad9c0346e8e39d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:57:50Z), 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/QT6EB2561065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9f0259060205f380ea1c4fc8c808da4e7c613ef8af305af72046b748fc1cbc. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT6EB2564729.