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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b91c21cc15efce183d425dc6d7a5a75be882a2fe4f374774068b79cd7e4ad5. 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/77d1c506-5c70-4d90-af47-4a5f6328f39f.json and https://artists.proofprofile.net/proofs/artist/77d1c506-5c70-4d90-af47-4a5f6328f39f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66408a4d1baa1dd0ede01cae292140ee22d0ee5950332b5b9eaccb5c9e7e906d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BKNDN2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05e3c33ab45e5c9932ef00305bcddebcebbe2a8ea6e0dfb1889cfa4c2df47ef. 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/BKNDN2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db21795b739928dd8f6689a37e4c42d1014f933d373b62632435964ad3a18ee. 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/BKNDN2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650d6ac1d9975b3bb84cef0e7df99352a13d9a45a8a729289efa06a3017002cb. 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/BKNDN2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851cb65fa5c6750493e0df8cc8abaa89919c38247ff722e4fd473dba282fcf11. 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/BKNDN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212d44cb7f1556b32ec5b0cb3d86952c602dfd1ca88218bcb1815495ca74befc. 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/BKNDN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a0d18c01f2bfdc478fe7e66f507b27552d76324d364bc176c98113cfb1edba. 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/BKNDN2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f47416d3cc7ff1b687fab331e35f25278f127acbc4e5b7488f014816b2422. 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/QZWDD2351835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c720a0cd012c1fe54ffd83d524f30b192f81a144567f011264cba25ad2caf5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCE7P2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d91da6c21cfe1e83eb428d8831c87bb8d5395611287a44a5910f709d5f960d. 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/BKNDN2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a9ca9aa9780fdd7a3570f0b751ddca2be74c9ba577da7ce70e0833cf9e9008. 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/BK1112300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7fbd5a72fb1421cfbe6ee03e4fc084d49ec5004ed06f65f30c7f38dba33969. 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/BKNDN2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b9555f14b53596dc79d22d995c56e9ed3e9abae60405a0994d3daaa4c5800e. 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/BKNDN2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9c4b41be4d30ede4b7b4c17069ef18e0be982ee2391ec5a7446e6cf8ecb083. 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/BKNDN2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2544bb71570e3354e2bab0b4fac9b7e2b090d18c355e804bae9ea8e06e84df54. 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/BKNDN2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab462da39134200878ad21abb03c48ec73c25a817e3eab6e731c314029c09f0b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKNDN2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb2bfa3cf77d3c390141ca8a652d62db6a6771604960cdcd61953deb9ffa38f. 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/BXFKW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5925a61903540e51e878561a30aab3d3a80dcec9254913eb766b1d7a909d12. 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/BKPK12400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5272c54a2be21568dda291e8d83d7275f7ea2a098f15e140e9e4591bce9bff. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BC6P42300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143b8b528dd89e60f709eb508561223e2b81aca1e4d9e6f7a43fc0d7753ef7cb. 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/QZNJZ2310737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432045df30d14c3fa0bcf0ae44b9e48bbd026634771fb2f81f547ecdbc7ba61a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZNJX2315283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a774acb0df081cec26dada9e4f207e25f89831293a3febbe748e513f028908. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXIV82381746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eb13e2c62ccda081bdc17cbcf194ca1e740df88238c703ffdcf2dfb2764229. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKNDN2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2910675c04a2e01456f1642f8015ec0af9d68b60fdc517da053dc7356b3ec07e. 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/USLZJ2305560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e6261f3b6fddc7339f697d8f2647791388bdd1637aeae3a0cd4559f72d8f90. 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/QZ5AB2384593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7b571dfefa1c3eb4b51fdc5465043545b4c0cffe5502b26b639413c339ee5c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118daec78a7870d30647bc0c2460caaca340dca975b5baf09ec5ceab2f004f9d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BC0IH2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba2783dab57632d4fe91c046cab974ef9054b38e5fca16dc28a0e07ba0d9c5d. 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/QZGLM2209944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e420aba00607a51215e759125c6a6303209643579e71fd9dea5e707390b0e0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKNDN2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8836cc9c29e409a5e361d7b8a19e2e30e938fdf00676662d4fa23b6ed56f34c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKNDN2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14531a5ce9ba8fbd7528990ee10cd8a8e30b6c68c8cb8c82387469d1b5faa89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKNDN2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbee3cde15190e33399c1b97b8afaf47f930ced1121bea43a39415ec5e70980. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKNDN2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ff1d35a3c64a4e0810715ab9fa931774abe6e1ce51e7241e9b8720134986e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKNDN2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf775f9d6fd239d0d8abfb75866ca7c46b054560c200c8e9aa7e91ab7e0cfc86. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKNDN2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058bfffe0381138e578705aa4590d42569b8fad51ddbbe6df6cb916ebf1f0af3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKNDN2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed705a4499858355a656f6f5255325b21ee2b5a0f9612381b8bf84ea4e2327dd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKEZ92300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db21795b739928dd8f6689a37e4c42d1014f933d373b62632435964ad3a18ee. 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/BKNDN2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb8ea53f7d85197b2cbfc99acd8729e9397d633ab934c6d4452e1f22cb0100e. 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/QZZEB2420534.