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 0x416e2730a69d7133ab168d78ddc71495aa8c9f862eec4ddfd2a0c2456fab51b7. 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/ec19239e-991a-4c94-bf13-e92a0a5d3476.json and https://artists.proofprofile.net/proofs/artist/ec19239e-991a-4c94-bf13-e92a0a5d3476.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 0xf37f5689d8fff440ab3c02bd4fa488e31dbae4392ef46e5c072348b431e5a516. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZNWW2093615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00546d98e3bbc67b0b798196915deefeb9de1738b867ecc83348963507c494f0. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNWW2093619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b97717c3446acee349a9f5ff30ee973cd3f2182603ba585d09f8bf8cae9c4f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWW2093620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b83a2ca1cc05172fcb28b88d8c9708524ad0c419383e1f5dcc523b313fde98d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZNWW2093621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363af4f97cf7ed58af158844ecee14bba9401890e9acb4f2751377dc5bbb2a21. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWQ2127246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d8ae712db3dfb18dc4fd6ee305e1eca72da674df95c9db91d93a1b5fe112ad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWQ2127247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e03b1e9c6a516f89cbff31b6ccb18011c566146afc3f5e65ec82d5f6bdf57. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWQ2127250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc741d7da994324ca52316dcb9497395b56e2cdd3edede8c103fc87bda9acdea. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWQ2127251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0908dc6cf7b119540dc468ee2bf16bea504cacc7f8c4e4e2a3c334c8ff8bfc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:00:39Z), 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/QZNWQ2127245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe869402f7e3dde92b4e53a8fc2b106ec652b69970bfb087b641ad471abc1c. 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/FR2X42281435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c65c7a3f81af1a55ceed443c54e179b146912767521337eeb6e8842ef236f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWT2234038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fe268227f3d1a966192cd35477d232a57b78c0e07a41b1bfd670fe913fa61c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWT2234039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3613abd2a853c90bc0697d5f35c5fe2613557c56c4239ff553d19f3fa4b631b3. 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/QZNWT2234040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd086c8e0f75136e7238c685bcbdd9be338e03f9b126a8f8f45b836625846d28b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:04:07Z), 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/QZNWT2234042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe859b8c12d97cb920649c4048603cf68676c56acab8bf838c9870af204771d62. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES82396596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f891a9f8d3475f29cc4ecee2abd1a51474fb4bf3f23e9fd2c23b174d0915b3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHNB2391733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe9d3a4348156e86c73ae12f991c56c8c22482cac54e97ce25e8370c03f5970. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZK6L2372264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f31314d1405f83413e5c809423221d28f2442bf25b07e84be3d3d0150a42d5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:33Z), 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/QZES52448743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31a37696dffc1ffc46121f3cc986f7c459a1858dcb43541ac9dd1d959bab074. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZRP52408905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997d12ffd0e8f4038ab304adace754b44b0dfb25dadf43eadd7498caff8bb30a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:07:16Z), 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/QZZ7V2473065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5459fe861f9f5cac7c0ddbbe7e5b35739df9e55e03d4056cca4da2f42d3a4708. 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/QZFZ42521722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231a0134d400f708a0e98f65d38b5ffe66c8a30963596f514896aa86b0625256. 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/QZK6H2581143.