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 0xe3396cbb2d1ce2195d10b2ee2462253b7ecc798dab87d23093144460ae2e8357. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d683d71-d4d2-43fa-ae7e-f08a656fcac1.json and https://artists.proofprofile.net/proofs/artist/7d683d71-d4d2-43fa-ae7e-f08a656fcac1.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 0xd4585d4b81e45a62c269f5715e0f3bc80bea65d9efdbc5d96fd13c48812e8734. 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/BC6MN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67797335e105658192d897dbd001d6b84ac682c7e2334c488a1aa85212fa7a2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:23:36Z), 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/BC6MN2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6435aee557db87521c19e24b1cd89f33c8655bd187b6abcb56585a696ec0e401. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:52Z), 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/BC6MN2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e82f1016edbc101988b43e3b8fcf028d861ca7efb0edbc4bf5bcf44f5d5605. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:00Z), 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/BC6MN2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d59e8971584d60d97af167d430b8da7e85bbe2eaebead7f0e17ce83f53cbc96. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BC6MN2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0033637ce8561ba3113b3601805ae6a81369d2b01644643e996559e215949d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:08:14Z), 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/BC6MN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5507de5ff8ed8400cb9a021063cb109861f1b50480d4a42e4369b64b5a33992. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BC6MN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4716609409758241c80ab943f8d80e7f5430cf13d42395d471c46e6c3f63e207. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BC6MN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc7a0ac3a76496fc0be81525e4ab3efe33d1628e2e3d292ba4746b64fc8aa9. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:38Z), 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/BC6MN2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40059129d0439ffae467bd17956b1299028c165b044868c308bc890d99a91b0f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:16Z), 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/BC6MN2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b70e3b69e05ac84f7b16bc7842e169cd2d28bd9d981fe7710ad444ca3484779. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTV32435729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3cc820842c35eec122ea3468a7998271fa433a721dfb4e5de710fed1ade75a. 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/QZTV32435743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e86515a626d72debfc4306d96c38c70ea91392bc4f50ddca7523b54ab309af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTV32435747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587f23babd1ae2f968b808f01f2a34d5326c60d5de40addc9d24d908fa1a9bd0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTV32435776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029060442edd90155f7bb0af6054113c94d7b16da657dd707e95366ae5959f99. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTV32435803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb223321110a2bfec31744480b0794bdec3a1ec105d381572af84c6bd2ac7f6d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTV32435835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca35a609498ec730d993c5be23dd989c136f48cc115e9e3f11167399c5329b65. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTV32435857.