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 0x13db90cbfb61fb7cac19e4036262678e5fe0cb80281a9e5028b0e846b54ae0aa. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4ffa938-583c-4a1e-85b9-1ff3ca408618.json and https://artists.proofprofile.net/proofs/artist/a4ffa938-583c-4a1e-85b9-1ff3ca408618.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 0xf0b7c0851c3996dca41a3df1bb60846950fa25117e2e9260a0365294df95c4f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTVM2381499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d458a22394fcb6f2c22047999e9f2a732eb84028751f1a6a67a831a0ef6ecfa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTVM2389333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fe73ce427727e8e917566f5a80a48677b265577547a553aaa91d68a56c5e06. 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/QMDA72268551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e494456c79a5d06facc9a9667f15f80cc3a31ef42dc948d7cda36e482beba8. 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/QMBZ92291482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793b094828098d7d3609b8a5c5278af30ea01d5daf30dea91838063bc6947289. 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/QZNJY2252660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08c3444374d01e73ddf0cb34544d3b923b85dc5917ca7f13ef9dbcd03f74de0. 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/QZHZ32227916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7f45c8268ac147c8f3040ac415d3231a61b3c146903e4d837c56e6140a26b5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US7VG1878412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7050eefd2ef4b10dadcdf71f93b4bea7995fd0778cdf9e92b2b42871adf8c1f7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJV2327640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985087e72a77a986a43c770e85dd289dd2613498e26584b0a6e46bb5de3cc5e3. 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/QZNJV2327643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0f2295fb1408a4da56ca29b3ef5eeeb82213f3f0ea66c3508d5295c699f21d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB2358856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa867eabceb26b3d07bc191e7d3fc2ab25b863a99e9d48939ec7db1d917006fc2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJV2327648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2d195a8a6759f487c0c739a5a858496004214158b900f1f160652cdae7bb0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2327642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bb3f5662ab87ca0c0e3834fc2e45d5fd837a8e6b8d07980d129563b20f23b6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJV2327641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1395c6e3366033d9f497914d7e1a8ee96efb3831995094c2396bfacb90a0deb8. 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/QZNJV2327650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da4bcb7852ae4577432222a913abe749947917465be565a524692fb36a208b7. 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/QZNJV2327647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de02fd7e3b5049094c66831253968f205de9f61bce51a54eae5051924f469b. 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/QZNJV2327646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484403cd684ff66142037639aaeab28562eb7b1d974184fa9ea095fd4e969a3f. 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/QZNJV2327645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4c5c75cda1b8b019b5347a1f4965b36eeabdf51419a4c669ff11a1d3827b19. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2327644.