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 0x1152821a014ca473ed059e7f1ce04079d4080fa52c189733babefd4084e734bd. 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/af3e7833-da57-4ab9-b938-6c1a113810d7.json and https://artists.proofprofile.net/proofs/artist/af3e7833-da57-4ab9-b938-6c1a113810d7.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 0xa98b5fb5274926a0e6006a9bc6660488004d84e8f22877e6d64fde04b790804c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DEVI21700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fe62f07a4e627a94b4d6efdf4058cf84895bd67e6d1baa1d8d4064c3578e02. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEVI21700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93640ba1d193112512efd16b2d5b82c78f7f488d01e23f10552410edeaa129d3. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/RSA041600182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4125625fdc83a5edc5b4d3f6daec6e19f8eff9eab09f4c6e2c235dcf65320. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:45:22Z), 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/RSA041600183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78406ad44adbbb13ba778c5d8ef660308a4712c5284ed58bb4d5a9852f4a40f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:30Z), 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/RSA041600186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396d89918cb4f2220cfe16c9644b93a0aaf1685f94e883ea584a8aac3911908d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/RSA141315522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59cf2849125f687b6739401ee307ac50b37fa2b021ae91838e25569e19f95b1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/RSA141315525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd137a267fdd6f3ecd97f4e765afa30e993f8301c3f9cc98c535c18a54f7b34a7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/RSA141315530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1ab7c99c91852cac05e9526181310dc06a87fd5eb6ce302724070e2a06e64f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:00:42Z), 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/BGA261110001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba1a2472b48bcfec9530755759a4b03bdcf427ae2dfefaf4d780bfcebee73e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BGA261110008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2399aaec073319b0dc640c12ff5cba2cfd3cf32c0f52255cd2d34a033c9d2311. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:25:36Z), 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/DEKB72427469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2900f35f97de8a733305818a4b7038255914ace50829dc9aff7f0c0f97ccb59. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:47:13Z), 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/DEKB72448370.