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 0x8c5d69efc5c6ec9e74b33b9ab4a2138f5233f622a7a43f1cac69961c54b5c853. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33bd2636-67bb-411c-b975-b1d60f26d964.json and https://artists.proofprofile.net/proofs/artist/33bd2636-67bb-411c-b975-b1d60f26d964.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 0x16198fd2c8df683f4d16ce8f22fb6bd70a9fcf2df8018fb5dc2d1f9220a264d7. 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/SE5BW1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8808a07828fc91c385ffa63447b6735068cdf0bc6f9f1f99c70fb030a5fd69ad. 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/SE5BW1500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8c257a177799f771c93882c58bd4b67adb0f696096b163eea2452ed1d4e232. 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/SE5BW1500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa241b2fd7004d39c6ea92bdb9dcd4411052b3daf250b95e12e894fed5fce1321. 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/SE5BW1500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37af6fb07d9945f34a65612daf19cd5613037fa10a8a0f86d7dbfddf41c47ae6. 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/SE5BW1500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17427ea37e7425f728b0c88b42f9a906cb0bf1da715792d8382068932d83fe1c. 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/SE5BW1500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586a2ae5a7e448379e139d2446ae4ee5bcc7c70653c8df0615c3780bbbcf0e7e. 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/SE5BW1500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7618b64bdf2a3f9877943312d591f020d71f8d7478df0b863ed0452e8ce641d2. 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/SE5BW1500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24677f72f8bf2a8238c4daf079dcfefea83a510698e222e5b0f5717c39436cfc. 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/SE5BW1500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217a9b7b91ee9af9b46cf1cc15714e30c87e275cb3602960eacbe5205e26499a. 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/SE5BW1500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cd776263bf2e752e84fac254f502c3060d8319f4f3294ea073e7a3a0cc9b86. 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/SE5BW1500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e88378754e996be1dcf0ea7e60788abe2ca2724236dbeaf303856454d87aa. 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/SE5BW1500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff635695d548272dcf02baeb50f53665c0ac4468862f6dce9653cd6b1a9b5ff7. 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/SE5BW1500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e52bc242de5adac755d89a339815278ac9199a9cebc51cbf58ce6a5d0c1349. 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/SE5BW1500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780c18706cda325e0e70fd63020bb3cc302d2dcf7b670ec74f3a4aa5caf03864. 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/SE5BW1500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7f54282ff4949811a8660444bbdaec417666a81f002ba236571501be170a25. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SE5BW1500101.
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 0xacc7ce1fb32d63b7c0c9d015389c22f2cbd99e2194b528710ae4598cec045de0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE5BW1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e3f9474de843952c9c600ceaaace0df02ce48c8edc615132d406cf52c739d7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE5BW1500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d14a7306d72cae6039b7f59d6a896ebd74f7c1b45b3628026ac502fc7839d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE5BW1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaad4c4ef5d7e5385ed9888a1fc21c5d7deb221e6dbad57f1225f33f70f009b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE5BW1500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff3b504e9fb18b23225eea32cb6a754619b0a74ce4656eae46f5487027b7d91. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SE5BW1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c42db3607685071b4e3c398214b6cd510316806e78fbd8eebb986940b24ce. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SE5BW1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde29a9c8057e450f5ccf3a3e73bccd8153fd566eff6407c81ee1d6702283c35c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SE5BW1500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb8f33362d907bfc81a62b0098541714f9943bb1ba3ec5340141b6e1bf67d1a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/SE5BW1500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fb548a4d3a5b0173f59d4f8fd9a6fd1417c64f5b84a6bf791c02db67e06e9b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5BW1500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1c06c273404797788169c750394ef6fd7600763ec88f38a8412384618e0464. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/SE5BW1500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c5de9d44997c4b6656cabef06bc71986f224c18107e1774f145865af667a2e. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/SE5BW1500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aba41c48415e0bee53fe207c95f24dd2bfee4e29909f4c05d43894d8146f01. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5BW1500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf997c9ba88d2f774cd8b7d7eb88066bc5f85348abdeddbaa5b8347fbfb3e8770. 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/SE5BW1500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3463bc9943db4f3e08650dfcb6ccd5c2e6f6a0ebfff401f31631c00d4d252778. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE5BW1500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf619c9d2a7530c0dc087418ddea717f0e973a105f9d70b77dc4f696684c7c520. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE5BW1500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5766c3fd29cf92542a071cf16195020df86471454ab39d1ac616262c9ba49e7a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE5BW1500133.