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 0x890fbb6f8ca177cba5a76502fd0e782bb1303606885aecd84ea5ef82a3d25f45. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acf522de-7e01-4696-a936-b35687df35a1.json and https://artists.proofprofile.net/proofs/artist/acf522de-7e01-4696-a936-b35687df35a1.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 0xd560e88cc7ab1192d6a86cb4270acc8bfe678e033e6ae4bdeebc22f87b8d4374. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/PLB960701401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78116001d53733bf11f218bb5a5ef955fbf03cc49c05fb14943b5401fd5b7ec7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:09:13Z), 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/PLB960701403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6314a216d5d5ae0800b81e6272787ea81ec3d186d14d11891c2deddc23b0c72. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLB960701404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9b896a72524fbcc04b579b51f78e096e812712d2e0b664d0d80688d53fc717. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:17:08Z), 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/PLB960701405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a7e6bdd57be3fe73ea525998a18dcd713cf89e1f85363afa366049f9abcc9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:31:07Z), 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/PLB960701406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab8bd1c2c112cd6ca83b868b7579fe6176a92d38dd33034a6f39b9f2fbac47. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PLB960701409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6b582c6dbfa8aec70f81ed8c7b43a3c32d5c1045f6632e553fa9d183b363a0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PLB960701410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde23d5429e1916206ff8aac82ee9c087beaf48b4259d3dc96b925840eebecd0d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLB960701411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32213d0aaf499704024aca108f5c34de03a3dc25cacca60b54b578d872863638. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/PLB960701412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a9ecf786a0ccfcc71ee733172ffcb314ff773fd425fe023cef6ad7b43d0943. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLI360996770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42962b41055fc4b4a81a6f9164c6c6175e27eb0fdb6335df65e0c8a977d21f8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFYY2523908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c907f5d9b53682f24bf6da581236b0d3cceaeabf03885659a225c0d34cfcbfd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYY2525554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc4e098b00aca093649f14670b42fa8dcb8c262c70f7824cecdec73fe8b55fa. 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/QZFYY2525555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5c8da5b135370af0fc4e7f2ff0bc84e6ee57cdbb0ca370f3c17b74c4798c90. 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/QZFYY2525557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a0f77813d63256c9112696b113dab1c9ea1253ac007585936d6620403b4f54. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFYY2525558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efb628092cdd0070361cd8ab88b96f60882a07cbc4a46d6183384c0f41f65f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYY2525559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4f08f581068174a7f6b173e8a554fb2c3bc2077bcf20cb16daf5fa5af34168. 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/QZFYY2525560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ca4222ab6adbbdd91401bb90755b8bf6ed83ee828536512b8ecdc06c0da595. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFYY2525561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b4bb21df01e38f94c8cae5e02e23cbcdd98b030e71b01081f2fb0bfb6500f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:01:38Z), 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/QZFYY2525564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac06b748a129d7e90bd0c0f79bb6d22930858349c3cf44598045c8650fa92f6d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:35Z), 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/QZFYY2525566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe5e70b797ced28bb52e1d8a4c575eda7cbf963102d31015bdf1c818d7ff5ee. 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/PLA391146003.