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 0xd216cbf872b84f051642a908a53e6e73d6e7d6f7b76e6b04fadb0207ff1d1198. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b129bc5e-3528-489d-88d6-5bbd5736e952.json and https://artists.proofprofile.net/proofs/artist/b129bc5e-3528-489d-88d6-5bbd5736e952.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 0x373063427bf6a5dbf7b7c963e89ea5f66f430d19d126b0d130c0cb3c38dfbd29. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA82046106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c426a30bf568844391fe6865944194f618b168fd3c619dfa240b8cdef98890a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA82046105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8369efa48deab22439b0c81fe4eb50e5b9135de64e837e9ef6c02d127fd16c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:00Z), 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/QZDA82046108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f7aa57d007e26df3250e919be3a08eff0af14a6b58db5f49ecaa2110d531dc. 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/QZMWW2122996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820498e30a3a9b89825de4bbc3374c5f28ada2ebc12021d7323687e620a64f08. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE5BU1945277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36277ad098550be7735f7ccd3cbc024d69c142492da8a48e222e30d80ba43f5. 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/QZNMU2284311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa8fb449f9829147c9098fdd7988f7ce3a63c8fdf9a0df2f7d75aaf0c88ab24. 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/QZNMU2284312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5128713514fdef1548ea9d8d11e6f96ef459a0f4614799eea1be8a60bf8d0394. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNMU2284314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25c1cf3a79cd33a27b6f0b97207300882310429196a98507e84260d3d54b13a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:43:12Z), 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/QZNMT2101360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba06c14337eeb7cffdb26ef4e6d6e299eb06f400944eb09e68d4d711205cb209. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QZNMZ2241282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7892f4848a7f59de075651cc5713d7fbff20f708e223d5338e041576f7216d84. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:37Z), 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/QZL382389285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757416ed6d12a656f481ce6c8007d209f99d5b071bea157a6989ddb3afe71e43. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GX3Q92387201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80119a6b99017ac8650bf1a4b20d43acc14f3fe556f3e64395af9fd34ea48f79. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:37Z), 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/GBLFP2325450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108a4375bcdc76f304040d01002ecd1850d3d66b22d34bf6b898b0ba9f890d9f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLFP2325453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b48e8151f576971a929877c8a22f6b9d42ca7974d1bfd0a5f5fe88d692ba3c. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/GBLFP2325454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b563a74c22a4a167916f3fc60f5dba15e3ea080402e51caa066e7ce6116850. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBMA22493760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1b90850a871a95ad39bc1a0d7408ef7730533778677278d5738d0b007e743e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22493762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb086f344fbd260bfa9ee90d3523c5b1f97394e0c72aeac97159d715ad4ad6018. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GXF9Q2446017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d48f91583a1049dca129537729e48aaa8911d6cdb7e780776dc672f933331c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UKXN22538160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b17730f81fc2556f1f4029ea6ca14bd8797c4ab956a4e82bac075d734833dd7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKXN22529191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1abfa4c38af25d02fd70151d26804ec18fef94e23966c8f9d28d38126687b61. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX3Q92562602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7512b8052d8c9783f7ba85e3cf9ea54b14a8120a5990e4d40666cf4c4d211d5a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX53U2548715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9a50908d8dfc38fa8d7b8071c22516c2cf585e1d54caee49082f198145caff. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:42:43Z), 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/GX53U2548716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc180d3e7de6d72f7bc070eec8341c71b0873d171053ff5da7e591a4fb0f6ca34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX53U2548717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57060a001c0dfaa887d9b4cc8908d9897d34f4c872541fb83bedc5e1315e9598. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GX53U2548718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906ace3946ca6cb0c0507499554dce82ba124cfd822347fed3f53ed4387d5e87. 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/GX53U2646154.