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 0xef5e796c888cfc8c5c5dcbfbc3131a3167731ac8c5ab9c171708cb9cf08545b9. 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/6fcddeb2-7b2b-4d8c-8a4f-ad1d1d841382.json and https://artists.proofprofile.net/proofs/artist/6fcddeb2-7b2b-4d8c-8a4f-ad1d1d841382.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 0xb3eec3b391b5aaec389c688f0549d2acabe7223132fae775538b4287cda4b39a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZA232200765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba8914cc2df68ed7a76fbfe76a0e68098f905844e5bb73815dc6d811d03a726. 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/QZHN92232326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda89a640419eac12d748497004700dd6fdea1a6fdc61beafde79b22cef7d0d8b. 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/CZA232200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d47023427404e6c459b5121f59912c2d9016a0dc6c47751f0cf216a0440a18. 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/CZA232200770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daf2ed20d948a455832ab78abd6e4c02ce8722e39ff8b79a67d8927810de71d. 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/CZA232200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cb60b493edaf1361e606dad81facb112bdcb939cbdc0688a555187561b615f. 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/CZA232200773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9533ed4133246f4245a854d4d0c71978a34d7ed669ad0330630bc10fc47a48a. 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/CZA232200775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854e9a79ff889f84103ccc47e1d2eb120f753b4f730269c57b25a518bb19687c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA232200764.
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 0x260d846d7eb5b9e418c46a589056d3d303456f154adcfcafd5414b87f6273391. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZES92216135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8f51a01314b773989bf6f9315af6708f8d1ec3b748d51956b2dd1f5a0a5d6e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA232200766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e271857fa3c263aff7b19fb6917e5ddb0ebf72e6d3a85114dbf68f41d2aaa19. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CZA232200767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62d3a880e12c763434bdac8711a18278ec5f6a0101beed31dfcef35b0c061f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CZA232200768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f130c06446247f1fc9f721540e4272727e9771e4fcaf1b9ece89677c642585b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CZA232200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6fb3bbc74519b486214b8b432242dcea33f0a788683f8e2536f74d2c2fb199. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CZA232200774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ffb36d4563942f47f0f9b5b45f94e8fb65aa7cfeb829a013252b47d432138f. 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/CZA232000339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6c6c13e4b8aff13fa1822a0a8fabc70866aba1b8dd29032bb5d8ff0fd7e821. 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/GBMA21969198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47809b1e8676f20c40cc9c507e4c534b7a2f9b9b52fd64f3fb602168b0180ff8. 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/CZA232201109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9026ecdb1a8aef26f7f3e4f00b8448cc8e3236a70233090e8b7ac4173d5eab. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBMA21228923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b51cd2398494982fbbf4d51b8646f2685c7d449adcc84b7e1f92ea4cea04330. 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/GBLFP1742652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d06a232fd8779cb1186fee5aa7f9776d82906a93058ce06810d26e224d973b1. 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/GBLFP1560094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5356447e09747848a0c67be927fbd84876842fac7b8f62ae797a7634c4cce6bd. 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/GB6ZN1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e3e5e4780e4aebe66fd7d1f9d34e96a69cfb45327a30112f831facf752f28a. 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/GB6ZN1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aeb67ad55fa3bc97c93bec3f3e721ebe9cfb1e3c7e73ec6569ae134693479e. 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/CZA232000381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ddee049d038da0bae16e8dc420014e6a3ae20241bd20ff8a70e746330baeb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZK6L2181503.