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 0xd0c5a59c87fbe4a950a8043190f41712b850d1c7437121f8305220f9827d3dd5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fd1a11e-7b32-4901-bbe2-dc0fd3cd188b.json and https://artists.proofprofile.net/proofs/artist/8fd1a11e-7b32-4901-bbe2-dc0fd3cd188b.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 0x7fbc63e1dc6b0c96b0b16c891ee6a15cf1ee95c0ac8ca2c907a7b37a05f1d4c3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:33Z), 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/USANG2000606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82625b390aa2fe3a199f8d618630332364f8f9e8e2201261e7a907f52aecb2a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USANG2092173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1f85fb8e94c7d1ffd3e267f86df0981a74a9164712b9d70a60c92e604a79ba. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USANG2092170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb749080aa4828e2ea78f0f65e6397a15e8dfe0dff7df0039789d7d17df9796. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2146903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11108a08c54b828d83041b26fa5eedb3beb5803812a6f711e2fcbf05baccee4c. 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/US3DF2146919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1394d4b7eeaf132eb753d296140db4ed09cec3773c0c5e98854131db2576294. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US3DF2146924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ac1a4a037784587fb56af52b71ddeffcf7bf3215aa23e7233e29bc8bfc55fe. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GBKQU2172109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df136afd525dc8172313fd7017462cafe322e9f46cd08ee6eabdceac37f4362. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKQU2172111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7447cd096e45ecfd24ccb294c4ac0cc9533ed5b329828fe047ad095dc095f2b3. 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/GBKQU2172114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89b4e34423e309ef8f57cf990482483bf30a529ca2c83a3d743c2c1ce0541c8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM3DF2143853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4ae8df5c1cf4d20e161e8ad6a98e82eb66a9fea2d0d6a54a09b5f3bd15c480. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM3DF2176663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768cd8c8cee731be03e9b93c7fcefa95fc5b5cb56fb9bfb97a935b818a189616. 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/US3DF2297381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f95c16c41a0fd48a04e126edfd107d5dc9ed216386fa4040bfc3ddbc4b75d44. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USANG2242839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a900a4f7e1e27615dbe1da497af2caf4e59580703f88abd912c1fad32405dcb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2241851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9acc5e23125cc8c2dac9272458797ff94367b65368f2621c02dcf42ff92ea00. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKZGC2306561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb8cad371a0c461acd6b6192100c4f4348148da33fc9a54154015f1ebebff9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UKZGC2306563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735f825fca2df9b9990ee3c457f5a2b7202559315afda66c62f5b40394d1d824. 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/GBKQU2204521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a46bf88f403f2e11df130c2479bcc436ba957f3bc945753d30b214301b2bec. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZN882247549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05707b9abb74688372c275b86ab147b6bb252e4d9d821770fd2caf61bdc21056. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US3DF2222559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735f825fca2df9b9990ee3c457f5a2b7202559315afda66c62f5b40394d1d824. 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/GBKQU2204521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523c33e91030456d1634ede8172ee5ba5772ade944024c7be8d2c714da00240a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USANG2170907.
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 0xef2b59356b155d7b5537c6394d660d6f99c43d3232559960659bf9e27cb89a09. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM3DF2161045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e59c22741e32a9c5426be5582202a826804b9b0571e4a18a01bb3d311d42588. 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/USANG2029067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef6a84f114870ffce6f13fa08108bdc2f38a09e9b1c6be79d27ff81e0f3ce32. 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/FRR642200862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d105589989facfa734fce4f19e79125ac6d402047bbbfded0d1c7c49f12cbac. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US3DF2220003.