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 0xe2135de85ebe8f19f52aea1214bad4eb0879f5def13fdd14283b624b08ccb3ab. 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/6607edf6-1c6d-4fbe-999e-efa83ab1bd61.json and https://artists.proofprofile.net/proofs/artist/6607edf6-1c6d-4fbe-999e-efa83ab1bd61.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 0x52410d034648c4545bc2169db7e1b0a627b2d64a8f073209ec3daccd77f01bc8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ATT251101340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0851e132edc494a4fa47fef18d54323c26697a186f55585ef700ba4a0959c952. 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/ATT251101410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bc98a7623741f6c68af370af0563742ac13db76a373f51fd3e2740c5ab5205. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ATT251101420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2efb383b8cd37d7a63849d8883a32fb69144ed2dee96988b03dafa61aa3ad. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:38Z), 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/ATT251403420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e846f32fb642a0703d30e980a9e2dd5e8ea0a2c6d7badc9b518cf5327b858b. 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/DESJ21800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417e5fa1a5d8e2e889da74d1873e7a7e0ea8d9d963ffce61dccbe7c623111ea6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:20:07Z), 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/DESJ21800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c44e344add6151b7fa45e67970ceb1b31dd000d9fd94fe0e6502c89e7242aa. 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/DESJ21800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531a8cf98fab609afe8638194e15a55c62a702c6f88ca9ae50944da11b051d97. 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/DESJ22000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3922aae17e8bbccbd3d5eac23a3571005f0ddd37032af92630e53c4aa30c9f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DESJ22000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4319942ebbd022cd406c0515034731c48e1d8635fbae2f0cf42410fcd606b95. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/DESJ22000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4302524a3ba8686b58e807632f397d4bfb0464c0fa4f1ca5c487c53587baeb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DESJ22000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0849f66973fe5f020c0bec0aceb1281328de17c8cbefa4417840241960c888. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DESJ22400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2299136ca8ea7ed0d3fbfc0eb060b0c5161178daf6690bd8228981dc95f06401. 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/DESJ22400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587523694618e7ddb7ab6e98813211681d146187d6192fbfe6811f75e0376535. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:46Z), 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/DESJ22400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33838b2fe2b0a7c9d01cbad49553dde4ea9d3abecfb30271dd0ef6eaf64e972b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DESJ22400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff317923e70cf3557f732039490c7f3117061708474b8a3ba9e0fa1c420a419. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ATT251101320.