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 0xe4a390e222cc2a27a46d188c3bddc988245a19a3d662fdec34de987915225ff7. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29ccd7ca-24cc-446b-9eda-c1fd47b7f985.json and https://artists.proofprofile.net/proofs/artist/29ccd7ca-24cc-446b-9eda-c1fd47b7f985.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 0xda10ee02ed30c9604e48e197707a64c6d3ea62c277a1560ec06e6b5cb7a71757. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/INP532000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda87553ba93531af6dc7c269a392c60e69d41752b1e718cede6f15b3001791f6. 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/INP532200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4606c01c63821805b4f24a9abf1ada0d75dd986dd17d38f6e25ed4099d6fd19. 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/INP532300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3040c53919bcff8e41bc7e367e9e1c4381a9b001836714d3b01e559a9b5405e3. 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/INP532300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd56e500ab2f99406973e9f4afb029e65a5658dfe9ed88cbe0983ffd3cb55be. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/INP532300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18bfd539592a4fe88d352c578b15432dafa9059ddba1e172239a0b63cc48e31. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AUBEC2405915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f2b7078997cbe5158d356a4d152e833e88872e343ebede88f593c9cc3eb473. 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/INP532400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e353240d85b4ecebc3536f4ec09eb6844a8d91c76dad237df395564a45341a. 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/QZZ7L2458106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e907f58b08fa29f6a8883f2a50012cf8f65003d239f4a372564f4fe150c2957. 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/INP532400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5846b1874f97054c5257c9c5f605fd154cab1bbeee6eaaa3fb1970709a2f8644. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QT3EY2438338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a163a60ea97d00ba11162a741ab867cace365aa7e614faac76da3bf7aa4192. 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/INP532500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f8355ba68dedcb2764839a77c5812589beebf2f31b1eaaf5d3c845dcf31fcf. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/INC622253713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c79bcbba5734a562f2bfdac05f604c4757a07c2c0f0c642d9786a4c91f7d7ff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/INV792411814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f92aa1f29798a1a330c2ad884a2084d4adbab8eaabb8424b3f2d0bbb92ab31. 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/INP532300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deb76599a832afbd3aa3023a72a9274315a6ac0ac81229fae44273cd08ff5ba. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/INP532200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf333159d63b6221a1f5e5cc1157b97b3994273a8e83f0bfec322da07877a6ca3. 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/INP532100448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3683ba3a39fe7b5358f99393450e6c37261ef5d674ae44cc4d1138109e9b5c7f. 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/INP531900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbd82bb0757bb63bf455ade25f8fa4bde5e7dc4963d50c1f9b7995c80b901c4. 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/UKJ8H2214621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2de2a475ad3c63fe5563a0012a32418a77fb76dd3796fc663a5e400afe1cf1. 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/INP532100500.
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 0xe47dbe6b8fc34346d11df58331d87b5420b577d0145efb331a91e80c72dad162. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/INP532100251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2fd6c19616bb966d34c804c074d9b2c5c17f3cb938aa8d7bc12f05f15adc2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/INP532000866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c4ef160379856aa8a0f7654d0707480c6b748132a47d3835b002c4146d2314. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/INP532000849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7320605cd1383b9174474e126eeab2a005646336dae8dcfa3a95761b0f5208. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/INP532000796.