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 0xd12836b2534b8d635a4c2b9e77c01e34cbd0e796dfbb0b12fc7c3a722d803a6c. 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/0a5cabef-343e-4898-9c1a-2ec31f3425dc.json and https://artists.proofprofile.net/proofs/artist/0a5cabef-343e-4898-9c1a-2ec31f3425dc.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 0x386d288cc61b3fee2413b5fdf87694b66d11150684b968158eec008f1236f7a9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES64E2324836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997afb96e486e1bd6e72a0b03a746fc7f240a5899daecaeecccafd99a537ef6f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES64E2324844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bc898b03d0c9d63c6eb3c41fae1d3ff70463d39fcf79566e6b9e2e013d020f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ES64E2324842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2b50833ecb573044d3f7dbecf6cb5e8a7818b87b3b652c3f025486d31575c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES64E2326310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb7cc83f1a6df11c1c1f50e258fac2b01e99b8bf5c49050bc317522e5cd8f8b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES64E2326311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8ec80a4cd87833ba617f7f1c561b81bdb935be0e52918043255a4f794d0b94. 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/ES64E2323906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61347f4efefd0dce2d54695d825e662f08f9c64f4d16021231abaccf522e1fe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES64E2337363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340615ddc68fc0e29bc4daec799e36a05d13a255854a41c84f8dab418e9b5e37. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/ES64E2335178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f39cb8751ff73bb5bf995c00ee9a0135781f63ffe24a46a5c3b63dd7157532. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:11:21Z), 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/ES64E2470939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ca4a1dc1d4f69a576b1dceb785b6fd8f7107d229ad17c536d17c07e71ffb92. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ES64E2470982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8bfe7ebdabaca67db09484ceff72eea67940849e7a69736b317a6ee2e55d64. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES64E2487811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784833cb507f995d9bfbc044749e25ad2bcb078a33ccfc6250010c5e9a0e5802. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ES64E2489287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457f682b28c088c12320f35c4f91fae180044638a960cbe7b94d1a9e1b728246. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES64E2489153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b31c25c7b1a795bf5b03e787d7012b31cc705cc3661d73e920416ef8535d93. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES64E2499201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1985327400587257f5987da882b34a09459729994b00228d3e1f722dfee8b315. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES64E2402981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dfd308e263b98783621b8f556a99b5f93aeecf8987b0bf3f43d25bc3e0231a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWDW2494879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa583a98aaf62882aa9c0971212d087cbcffb645129fb79818be636918e8622a0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWDW2494758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a62e414779aecb823db0d395b6053b7a83798725d38db9e070c3b7ff99e2213. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES64E2464264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac92c75c460ff245fbc62b19b57b785140c232d002c309244952a7974fa1349a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES64E2502113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb634377e6fbde0962da3dbd2a0ca1d95f90339e5a4654e322214f5ecedb77ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES64E2483014.