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 0xe5aec199e5b81bd4997a91f8d0c102098fbd3d822a8fdf09cc367fddf5651557. 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/e7fba86a-6a50-46bf-84d3-e51570c39445.json and https://artists.proofprofile.net/proofs/artist/e7fba86a-6a50-46bf-84d3-e51570c39445.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 0x4d712db49ca9e4ef6b38d2c46d991daa9c1e13df1a60293802d507c1274a3dde. 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/FR59R1886378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315bffe496a72606eaade0a866ee91736039baf6638dc4adbde2a30a55c846dc. 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/FR59R1886379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df7aa6b5930b8cc4661c4153ff3093cedb9c29fad24e31f5aa933d18b62bcf3. 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/FR59R1886380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548af07ced690e5b7b62b9db387ed6b5fa610d98bbce998318061be7263f10e0. 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/FR59R1886381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b01217d8efc961f2b413cc983d1cc02c0551936f0f2a4fa023070252dc25ea. 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/FR59R1886382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea93c1812c884286414bb833e4f2898507fe96d7eb8f5bd4427dbd7d82b789. 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/FR59R1886383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d57f3737a8949d10aaab9c4ef310104bde1dc5f0a60c24c2c20ef3dc72fcc7. 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/FR59R1886384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa397b1db415349d645b05e33655d3cafc277da4a530064155aeb867ae44a45e9. 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/FR59R1886385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc699151dda352eee231a023cc99b03d8eb8eda69dce018e009680a7d30a1a7ed. 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/FR2X42111753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608852f82b87c26383e8d7a37e2502914509fe64e9cc38c18f0c77ec870e8648. 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/FR10S2261003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6aab9430ff9677c77e8d2eac7ea646f84fc4983ef91f681c1befafdac83866. 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/FR10S2261004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1822fd719234da8afa94dae2ca14751c93a4aff09580fd63d1f73cad678e57a2. 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/FR10S2261005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4284c6ac4070cc54b2b43fd5469b8d2111e48f306605cfdf92deb71663bbbcf3. 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/FR10S2261006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9890ad262e972449d0fac394174223a850ecd786d035a3387bd4be485a13befb. 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/FR10S2261007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc097891c0382a0b412b25b19a7676f2179c3d6760b8d8e534a3e3e76d0b0cbe3. 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/FR10S2261008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf69c86de94bb6a6ac25ba5437e1a7f499cad222d4a8b06f9dee43055cf67579. 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/FR10S2261009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7911400d0af332d902f5d5e1737dd7f02cd8444220234158432bfbad4de65237. 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/FR10S2261010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba7f490ecce72697d81381154b33d25e98b9ee4977cfc03aad412751db7a9b7. 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/FR10S2261011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e15e7ee1ff58f3aecf79645fe814a05ab5ed879440a34523bcee33abba57f3b. 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/FR10S2261012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32218207d9368bd46ff7dc976d5d585b279a2fa616c76e7dfb8a14eaf47de7b. 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/FR10S2261013.