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 0x7d40d877c1ba3a7637597d039d93438f0f85a4c3f30c774a525ac465df1586e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e348f6d9-af4e-435e-b726-7ef31bee7ddc.json and https://artists.proofprofile.net/proofs/artist/e348f6d9-af4e-435e-b726-7ef31bee7ddc.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 0xbf06964754182f4d24accc859b92d6521925e705d384eaeb836ea443f8d42daf. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USWU30300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a23fc8e538455b06fbb597d7621b72bcffda015f12e33a66e47ba35f9867c2. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USWU30300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b78453bd7517865e1a871793c895e0d556330eed9a4cd2dbf7837514abcd93. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USWU30300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e6183abc6a0c386b8e5a86ce1d48e044fddd2d2d6c9323eea569b96d23ffaa. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USWU30300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8794d6d3ac9c1029940184fa3292bf4af20f7130fbbc8715709b964dce1152ff. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USWU30300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3803db3a48d92f6676469ba5308c4297edf2ef92818b1fa5a62e6972d5b1d0c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QM6P41945031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d43008c43e60d1b7de7bef75e85e701c3b720f46d10b96fb9eabaf24ea87ba. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM6P41945032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233877599691353671da3782c5dd853dfa0f5ce76510570e58978fe3e81d050e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:31:33Z), 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/QM6P41945033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c6e6b56a101de69665f53e893e2db84ca40ce79efd6077d9481954fe1c4f95. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM6P41945034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f03307d2575d56d3ef062ec8c748b9e72d7fc98282d79b1ee5ed695da123ad. 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/QM6P41945035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06993d784cf8e8399ae729dce5e3d0e1bf80a457bb78f4431e3eff37bc66af75. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM6P41945036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e4522a3a14c5b206fc1d1a5ed25e81bfabf357970e011da4e4b2ff7b4329d6. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:34Z), 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/QM6P41945037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75406ec934d8c52829dbe12ad6c065e369f2991012c99d48cb136b66e6038b5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P41945038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad513b93c9b76fb421395158907af18d0966639096178bfa0a9f4e1ed1ccbeb. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM6P41945039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7700d70a599a36d3e62f6b20916db430df4a6df4b9804d152e03d06ae6b82c4f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:47:05Z), 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/QM6P41945040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124e80291160c9be85c2ac132cd1e9c03ebd9fe249e0cec05059fb54e284931f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:55:32Z), 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/QM6P41945042.