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 0x99159ccdbf7e517305f0e206f39f2a2a32751e0c4801b406a7dd72376f68a5cf. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00f0db29-4a56-4734-9ab0-d3657556eaed.json and https://artists.proofprofile.net/proofs/artist/00f0db29-4a56-4734-9ab0-d3657556eaed.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 0x259c51156dccf59e9a6b99fefcec6fbd9a9c89db14a3777cfee62c45c64a1d13. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTPX2376636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179d264294e100f1a15b29385167c2f5aff4f3009cb56756c87e41b8f1023b75. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJW2372530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f7223aa8df3b30168fcc258e96290a23227ac93e0f9e667b927c7a2fab194. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92324387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ac353bfd639455ed781442c1500ecb0a767c3d7623b00ac2839a47c78171c5. 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/QZGLM2360478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a69ccc724ac93415cbbf1a96485b7af80b47334e752c9076ec0b760d58aaad. 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/US7VG2372671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1abca6b14b594d57928338f4fcb5654cc249a8e12abeb37cf1382313017be9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZW9L2279281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0446900c9f85396a2f07fb6317a054372490b33d89257c43bc10e49eef594e5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJZ2248935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce66f21d50d7448bb1984528f9d1bbafb515ec789e1aba7e6e4e2f139c11f50. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLS2195837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179d264294e100f1a15b29385167c2f5aff4f3009cb56756c87e41b8f1023b75. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZNJW2372530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f7223aa8df3b30168fcc258e96290a23227ac93e0f9e667b927c7a2fab194. 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/QZMZ92324387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687c4adf202813ec66f8285db64f0f03cd52ab3c9d7a921644c74b72ee66fdef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92324389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc154be01cc0dc824c2a54cd5a16ea4f4a7be863f663acb73acb99bc6fdab19. 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/QZGLM2523504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cec4660305cc70c8b1e2c9e050af82adf4be9d6702091a147bd4bac5c0768c. 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/US7VG2574883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b4413dbdc72e10654a56b5ce7f2dc7b9bc9f354d408eef50d8c1899ad42cad. 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/US7VG2525551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa950a8e81b3aa8cf65599ce24c0e65d44289580d35d8deb54ac7ae3de7c5d0cc. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZW9K2419779.