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 0x5472b568bdeb1970fd93a89dc71a8e41319bba6a0fddf01fb811b481f6819999. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ae15946-7ccf-416c-80b2-7aa4edab9ea0.json and https://artists.proofprofile.net/proofs/artist/7ae15946-7ccf-416c-80b2-7aa4edab9ea0.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 0xc3d9b3bf3bb32c9a1c3f3e110ab7d239ab515b694962cd05d2c1794f78bfa7b3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1H2221568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f74dcec2498295cf43db178a3ac99ff640d171a2da9c4bc4bcc2276a67a145. 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/RUA1H2221570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42e8a2025fd7cf892fcdad7fcc6df9e1b36b1cbf053cb0330ab0a0bdd3c516e. 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/RUA1H2221574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46180ddeaab31b814022dbd806e41ac41f9da67eb3d8bc022f38f26c67d24162. 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/AEA0Q2227289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae06ee9bed0bfbd61d44fa141bb5e4bf2914c1f1f4cb24cb95c0347f07f1b76. 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/RUA1H2221571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b184c150a9f4affb1a28bfe724b1bebff184ea1753b4283f461ec7f2833aca9. 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/DGA0L2348701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe38faba9668c5f89fa7b51f386d06ec1061f66fae253595580559f94a25dff2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/RUA1D2429403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206a1d53526f3962c5b8c259d97a6987787d1f25c15afd44b845bcd19c1d3a77. 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/RUA1D2429405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ef9776d74505b08b70831bfce8e2b533853c665733935d430c62b5bebe92e7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/AEA2M2462137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc00a721a09c98c1c5b8080f726e3dc170d2ac7f985da830585f1a621b95ef. 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/RUAGT2462134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc253cee6541075f3926ad23340257240c58229deed4dbc3ae05657ed0c68c202. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZW9L2467706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa706599760f57803459e2607315d1c6ca6578a3ecdad64e098895a9c234f6f7. 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/RUA1D2527535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a422003020a3c3ded1789978c845d0c17a31d5f9090ba6fd45537d92497f39. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/RUA1D2527536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921f2d956da0dc54aae3b3a41e3a58712795ed9d5d7f6aa21d21c068dfc4272b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUA1D2527543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e9f08cca0e4acb3211be481bed92c2869353893a5f931d2cf38d792417cad4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:20Z), 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/RUAGT2520430.