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 0x316dcedd938f10f72c575324ba6040a4471f5bcb02ec0dc389f443df357391dc. 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/3aaac159-e9e4-422f-8e78-e4b2aa357eeb.json and https://artists.proofprofile.net/proofs/artist/3aaac159-e9e4-422f-8e78-e4b2aa357eeb.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 0x48796b65657e37ee81e1d3e64678878d8baac312daca9a570ae2d2e235ae7de6. 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/GX38U2303389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c4f30b9d4681ba0c49d12ced04463c6663ee67fdb248493290c129e965136. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/GX4R52259658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe0c04baac88a0def3e18950e4cd28309bf72317e06991e9fd159faef84219d. 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/GX5MX2127355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1386b6dc901ac9a26ab9c2a1dd8c5b423c54df99f0ed82db54760bfb7b692edf. 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/GX3HH2169611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf08c95738006d11214172f7c72d6fefe34a8caa6b31dc58e6940987d147d9cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX5MY2164370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3627b6b5793f10f637b58a6e25dc24d2ee71da5279ce1bb5c03bd19657e228e. 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/GBSMU9081148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da69df6bba85191a51d746f36a013f2ada36b9ede4178157bdc95ba02b42506. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITV081600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd603ec75f2adad14bf1aa9e1887a2a5ac982ddc0e809324067fb5563e61e64. 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/ITV081800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755fb16fe610df75cf860820d9b769d5daef843917c1c10f69c659680a274675. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITV082000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78042c24666c3d7005c9c518ead2e0089a896ca896cbfe5be873e524ab3daf68. 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/ITV081700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097aa98aee63704fb06c2e721701945410331ee60c32d8beeeaa6e7da2b18ee9. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/ITV082200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20c06cdaad6b673614858d7f2d4fd42d28b7844c7134b74e2e60cf501446cc5. 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/ITV081700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7022090eba72b202e0ef05b1e79e1ae2eb260d7aa339f8129d94fcc1f4669e32. 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/ITV081400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed4432dedc218144199bbcea50fd84cc3e914564d7ba04443d3f36f02979305. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITV082200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755fb16fe610df75cf860820d9b769d5daef843917c1c10f69c659680a274675. 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/ITV082000001.