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 0xca2e6a99ea4fb7161f01882e0f43d6eeb75299980dbaabe1264ea331a406ce41. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a1d173c-e66b-4c35-9b80-33c18125cdc6.json and https://artists.proofprofile.net/proofs/artist/8a1d173c-e66b-4c35-9b80-33c18125cdc6.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 0x24b8d7c1271ecbd8dc3fbfb895073a7051b8ba830eb6c1d2462cedb20f7f3c0f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:09:16Z), 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/JPZ922500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3bf51e3a907ecd43a57fd62348f98f6f35a574b2f4d071a5939d76f0801610. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:13Z), 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/JPZ922500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aed0ab63995d8658fdf283da780d92798b7718ad9367be2085864c3cdb2ec3d. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/JPZ922500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1303cb47e02af309c442be1f3cc0031f6b114cebf757dc71b5d9b9611578efa8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:05:18Z), 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/JPZ922500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6ed028a5d67d6f6ee75f8c47f5721abd86764e9cab8d7dd09b254ee651ee4c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPZ922500428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d2657d8c2e5a869a8d2fe7694e82a916841a6b9b781fe1effcd4cba3bb1cdf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPZ922500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecabe59b3a376d3d82e90774f0b8c019eed060fdf8b8f466376bd0bffa8e35e9. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:58:53Z), 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/JPZ922500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a6a5df6585f1555ed22f2d132d3403e253cd5bcb22d24683171e7f8a0ee16a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPZ922500432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d790fa67256903010a98ee4c453f8ae950bb2290f43e889971bf86119fdf8e. 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/JPZ922500433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb156149d4fd10a6020cc40495717d77ff746de3eac8145c755fbf6ecb37d19. 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/JPZ922500434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bee057f4473bee3fb048e1747e2f488da870f96f4490529b4cf2f3a1b199cf. 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/JPZ922500436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70966e48a1bfcd15e611906c8b551f8c2566e5063fb268d3ae61e0edfee3d23e. 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/JPCR01603670.