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 0x275cd8863bb777c12f9074869f89d8ace0904c3eff7c8305a87c71de79ce5ef0. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4787e25d-48e6-4e9b-a261-ac17f1b69b99.json and https://artists.proofprofile.net/proofs/artist/4787e25d-48e6-4e9b-a261-ac17f1b69b99.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 0x8d4d44dc5dc889c05ffe6d054f95137662d095b3e1fbfb3f6965a8884edbe1ee. 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/USL4Q0760429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5d1ee4734371507e8690763fe0aa05dde89dda30ed3f9b7d4648019770729b. 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/USL4Q0760431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b67bc8d81e0b20b81b3a7ed594e019ae680962bbf7b71875594195c235c9adf. 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/USL4Q0760433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73df32a2af196ebe0213ca7f98ec77c696fc2f14c84feefa254f46676f040dca. 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/USL4Q0760440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d0d45a688e1cf18bf1b9d66d0e75b734284db856661ef4684b6d3b8384cfbc. 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/USL4Q0760430.
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 0x88745675dfda77c6142054b71a71b2269a79521b6c6dfb953b81c3a1bd8b8e71. 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/USL4Q0760374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3c0e0e3ef5be1cc466db87703b3427207928fee29e639eb0a7ab2e6369d4cc. 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/USL4Q0760385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2421a93e192eb8a174188695076ce85558d03392e90a26dd80bf9d597f6182e. 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/USL4Q0760386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebc05fa218862094c9d751e8f1af6fd85bd5366bceb4958f31a9076b495341f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USL4Q0760375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1944e2ca2a3c361db558cf329f145f7356420acf428d5ee647d32196f097ea. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q0760376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b87bfe630a4fde4b1bd22dce236d746e98c0ddc470a21eace9f6e114a031c3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USL4Q0760378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0410b154243c5fdc17542ee1bf7f6e05fba0137ab957237debe4bf979abab2a0. 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/USX9P0775763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ad9ce738f4b3718b90939df8fbe493723636f9939996792a00d95df0f008d0. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USX9P0775765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f95ff612259a9f3b7724cd68a45f66ecc5a88c690b91d5d1480f1dfc50436a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USX9P0775769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186997cfe4a7a2a240ea2fd460b29a44f28a45d8be8103f9fcdce49234383c73. 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/USX9P0775699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68aa771c4ae487ab49ff73c7216921737c9f98c5c7daa9c0ffe8ac2d29b003c. 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/USX9P0775703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7191be1e02825d4194876aca0c5864dfef7274b483973ca41d03e3687b7491b7. 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/USX9P0775704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e9dcd99cb9f9a5bcb8cc5c2544b5d3cd086f5b2a2ac13a30e3ad1248e1a35. 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/USX9P0775706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7cc7b36abddb7638b756ecbe5705fcac82c300c14b63a418f15f4896e4af25. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USX9P0775698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf747821abfd618dcbb501642f3348e4361c64221038ac3660b53d6d100c253. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USX9P0775700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28df9e49e488a85d4febb0c7d6c1e4fc93ee0568c4672b4b1df864a5df23b980. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX9P0775701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2ed2800457946ad8db0410d67c68483701fae7adc0217a73fd5a2cb8a48644. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USX9P0775702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b7c87a167fc289d538300182a8c4636fb0e7d9e4ac5ac84324fcdd690c3b35. 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/USX9P0775705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d76ba404a28b60cc89bb4af32d025837f8a5db3fe73211dfaa502ca2e5e9f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USX9P0775707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe017af410ea7a1228e544c69bbb08e66d570d9eed1907694f15812fb06c40368. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USX9P0775708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dabf17e9f50ebb3bfe89a45c03c5ed306995d4b446603cd1f5dd229dc90d565. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USX9P0775710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b737c47a8d7deb27fc67012af75f7f1e7bea6a72c803e25d723f7353dbb58. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USX9P0775713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2079a4256124d84ea2d01eeddcead329a0bd11abe6c29afc6243f06d4b1305aa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USX9P0721356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6c75e06e5309b713d76e714fcd43b56e65d5da5593403d14212e5cc9780abf. 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/USX9P0721357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebddaf636b5720b38ce6f1475c1214d1eed1762aaec82b3ab68270fbdab633ea. 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/USX9P0721362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb80df26882b85dd0e637e92d67ec52ef6b8c79e9dd7ee113943be5d04874a8e. 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/USX9P0721363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e2233cd98cdc3de5c86ff31a0c8bd511ee2ed30deb1d40cd2a858a135e5b2b. 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/USX9P0721365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5793bab355e746facc3957614e5879ffe5e15e9d45ab263fa7221b5996132fbf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USX9P0721366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c8f8553bfcf5a2fc875f2c4c44d072feadd7486ff2887ed24e72a716416164. 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/USX9P0721367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deef19a35511c4b27d65cadcf99d35c7edcdc119b6c65b86adc03dbbe4c66b4. 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/USX9P0721358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aecf3c770aeba8dedcb86ff6a9b91cc63253ae06378f1e0a06938478bd129b2. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USX9P0721359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ddb80bbf1036223b6917743d94601623d08477f339360fed00d4b7ad1978b5. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USX9P0721360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be9008b46f0220469b963402049eb83b4b5aa85254a67ed00e54b4500b37aae. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USX9P0721361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab93c69e0c850834ccc2800d3967b89c70774d28e57bada70597560125f2c18. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX9P0721364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64881d03c7b4baaba9c9eca953d4a09f0eab2cb670a0f74dc029f4817205f6de. 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/QZNWT2060731.