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 0x31907e024187a9dccbb8780002399ac647f0dcf36851330f02f9a07509469452. 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/f6fce503-b53c-454e-ae4c-d8990e6c9b88.json and https://artists.proofprofile.net/proofs/artist/f6fce503-b53c-454e-ae4c-d8990e6c9b88.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 0x78378730af1f5dd5e6851a82a3cb2c420346cd4c0f19cc0a070b1b85cbd1e4a3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QMFMF2399129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b858636640eab34129b2a838e99849dade85b8dc249c6aef60bdd7f228248d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:18Z), 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/QZYHM2411287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1e9491bf08faa9e16da69d31a81de323a153a3b873c9eaf24d474bacffbb45. 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/QM6MZ2439723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886a2ca1136b362feddcef0b19116697d20ed61ffa6788d19da880f7bfbd677c. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QM7282453135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7ac5ce4e903b15ee40e41d6c042fe4b23b7fdb95d47222b19b081af14e35d4. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:44:34Z), 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/QM7282453207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f5a2ec2fdb3ca59c618dc0c2ed8187fb09a702179e5ad4398fb0ed6c8e6bd5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QMDA72417832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e531842ceb8e35d7613850da6481ab4677dc3492610b102983f42897e3a9e4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QMFMF2450100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb852ef807190888f3c05917bc03b0f1c6c1125baa3ba4323e0c7a5098f63930. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QMFMF2450271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62b3b7316971112f2f7ae7fe3d1189a7be252b9fe73a4aa64fad9ec02602ebe. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QM6P42557107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e68041233775f11332d271ae2fd30e8eaa61d0a4673ce953ac4fe3a66284a7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:53:14Z), 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/QM6P42556209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815fde4d1c8a3330063c14070d65213a1d277c9a0c79493b546e17525ff15f55. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:54:52Z), 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/QM6P42556181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d73f0b66b230f51ceaee8bb904ef13ebea62ccc6531c2d4b891868d571bd42e. 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/QM6P42557201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771ad5f0266b423898680e99dd147943df0966b23fb782440ec07a71be0b6451. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:43Z), 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/QMDA72517565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6692d0e8cc757e379e3b9ceae6fdb4bc5d2910e7f0cff9dc82a2e650f7b2ec7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA72516643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1428a1ec61e1642dfa96b80f81c6243dbcd2daf0d10e128b2e109d50cd45d72. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:53Z), 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/QMDA72517022.