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 0x2e9cf9f0feb3344fafc4498ef422b673f3ab7c38753f13658f0f15464de4687e. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23bd93ec-2d4a-492e-a21a-85da20008068.json and https://artists.proofprofile.net/proofs/artist/23bd93ec-2d4a-492e-a21a-85da20008068.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 0xafba0838424f9d0011fad29daf59e5b70b6e3254441dc4562a91e0e1750563e1. 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/FR8Y72100445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2cadbb842a83811c72e3c15f23eb23c5c409a9ae42029e62b9f45a7f43a3ec. 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/FR8Y72100438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424ec62d7460eab92d625eca8d3b311f700cc288ea73db6e4f7341c6da92543a. 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/FR8Y72100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b5b937e74dc13edd987885b08c16befe63b69191e418ef7ebad051540b2882. 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/FR8Y72100439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223a8204291e67abd21f9dfa6e86bdf7db45464aefe41cf33a7942bcfb5f8fbb. 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/FR8Y72100441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7427fa8b8a2de5169cb6f5f827f276712f7275ba21eb68e7cfd290b6560b8fa9. 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/FR8Y72100443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f62ebefe087c803bffc45b2d132072bc5c29a6b6a70295a99235260aa5c86c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR8Y72100442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafba0838424f9d0011fad29daf59e5b70b6e3254441dc4562a91e0e1750563e1. 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/FR8Y72100445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bf11aa4b5fd9cfafb37334343264d04598506ba11706065df5f13b91b928cf. 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/FR9W12129568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b449337541da4c3bb920afdc916e608179437c4bd6db7f4b6eafe801051825c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR8Y72100449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20a53a5521a25c0f0cdd7ac50393294e36c171fcb9b11e07bd3bfa128d08a47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR8Y72100450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b8a7af0081c3242bcb8ea2b357a3d01fd307021859eac48469dabd7697f760. 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/FR8Y72100446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3448081b6b6e3add72e7a39681b51c2f1458a90055bd93a0dda67f343a0f5af1. 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/FR8Y72100454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c52aa92c3b9a5faa648f54bcf8892313bf62ae727804ac1a74e20d77460d7b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR8Y72100455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f386ff00192d613e69efe1330e990a9114e4f858d94bb5abb538f76689016e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR8Y72100502.