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 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 0x72b037d3fd9a16cc78e057a2e63e691e305e7014736c31f3d8519c80fcf7d04e. 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/3f2917d6-02a7-4d94-a20c-de33073ae801.json and https://artists.proofprofile.net/proofs/artist/3f2917d6-02a7-4d94-a20c-de33073ae801.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 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 0x4c80d73491b62bacbedca0851d7258a84b19bab9971baaf5fe314a3c76761714. 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/GBKPL2295351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101abcfce3bcc0bf9b99a7084335f7023ede4f3c74236c77a143681dfcaa96a2. 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/FRX202257588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de9b7bbb078988b01b8fb6ab7852115c64461008214f803f2aec94a65d6dc55. 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/FRX282252177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c80d73491b62bacbedca0851d7258a84b19bab9971baaf5fe314a3c76761714. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBKPL2295351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101abcfce3bcc0bf9b99a7084335f7023ede4f3c74236c77a143681dfcaa96a2. 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/FRX202257588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3afa362fa17a6cb7bdb6f1d41b3ac0f2f467d5d286fc4e625f2d2a9fb6cd3d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRX452238669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de9b7bbb078988b01b8fb6ab7852115c64461008214f803f2aec94a65d6dc55. 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/FRX282252177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca08e4c50a7edbe8e634858d578022904e1fe4014e728b6b3a3f204ea676c534. 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/DGA062255540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e66bda1afe744ca98fa1eda783c34b7c7f394390a8b67d323d4e997fcf8f9d. 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/FRX762271785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2c73d0b3b57115ffacf3416087759b7947ebaee2912960eb5f4094bbf00e8. 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/DGA0P2325585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8090e0990bb857c34028ca92ffd54bb7a0519334c77da2656f6d28e4de1fad62. 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/DGA062202203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f1a75c90d16ea32e142ce651917be1c36f028492d72a0fa6f3c7b5aa22645c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DGA082239667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cc7f1ed320d8cc5d4e551ec64a86f0b8e49e2e19a83cec7ebcd2d752135cfc. 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/DGA082239668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6509da54588965ba8372fc230c40807149e6eef4b75c4d3d57c778d7e506e20. Chain 2 (Bitcoin): anchored in block 957210 (2026-07-08T18:28:05Z), 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/DGA082239670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f458958fd21b52ba09a80c40d4d788a9ec986b5a5bdcb3ccd3a29100dbf9f31. 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/DGA082314969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c4150680c74813e3150009ce75aa7a8e697b72510bd31fac41bebcddca0d71. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR96X2358483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c80d73491b62bacbedca0851d7258a84b19bab9971baaf5fe314a3c76761714. 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/GBKPL2295351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de9b7bbb078988b01b8fb6ab7852115c64461008214f803f2aec94a65d6dc55. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX282252177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca08e4c50a7edbe8e634858d578022904e1fe4014e728b6b3a3f204ea676c534. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DGA062255540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3afa362fa17a6cb7bdb6f1d41b3ac0f2f467d5d286fc4e625f2d2a9fb6cd3d. 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/FRX452238669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de9b7bbb078988b01b8fb6ab7852115c64461008214f803f2aec94a65d6dc55. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRX282252177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101abcfce3bcc0bf9b99a7084335f7023ede4f3c74236c77a143681dfcaa96a2. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FRX202257588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c80d73491b62bacbedca0851d7258a84b19bab9971baaf5fe314a3c76761714. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBKPL2295351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab73dcefabb9a2cdb0f8b472f14132e9bafc59d2f27930314ea41d298ed15f. 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/GBKPL2287150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8062f1098c0ba1052b5c694dedcf90d996c04e16b0a7b0f38f5cbadc031f6cb9. 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/GBKPL2287149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40785314fc537b2f166a3d219a57b00b4df7e000f104d84c1ca13305bf7c2a6a. 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/USDHM2111539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce69420107ca0b2c60e320ab8279f0809cb7f9fcca36e9ffb4cbd0d9b73788a. 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/GBKPL2287151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa675a272069797de91200b26af3bd9d7f4cf6f2feebc7830e5274ad0fb545d. 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/USDHM2117380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f190128e2a43844b44d2f3fbdccfff65f16212db6663509818d05761c056d1. 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/USDHM2112362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364573668da6df254ed0662943555607a9dd9b41c4c3809151d170117a73becf. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USDHM2106229.