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 0x1817175317214202b63308fa9f8ba868fbeaf4f70ac25e0837dbb16cb8de1c0f. 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/c7497a6b-52e3-4b69-8f1c-8f175fdf1e90.json and https://artists.proofprofile.net/proofs/artist/c7497a6b-52e3-4b69-8f1c-8f175fdf1e90.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 0xf4101a83c7c89b116586e1c054bfc14f0b798c1f6d96262f0999d9a42141cb59. 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/QZ5FN2140353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe109fd4a76446cc18b9122fde4ad75437e80c51a02544f09f7b8af2ca105a828. 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/QZ5FN2140355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe737b48f375683e3a3fdf04f29bca9c9685be5bc84a97cd9d11b35432833e52e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZ5FN2140358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe958bbeefbb5f083e9524a64e72ac9d99621451cc7368c726b84cbd410b642e2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ5FN2140359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7826a39cc5a0d4beea277d119bd9b97cec5b6cd047c207c0697403c9b1f710. 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/QZ5FN2140360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9697db890648940c1f71682b85f6ccaabdd24a329601b9578e69f1a4de5f6e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM4TW2045079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9259ca2275a378252300b626798b1d2ecd52b9e76b25fe4e8596af47b61cca2f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ5FN2140363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d147e787877da4a9048155b601118e2d38d05533e639e52602927a43d9721. 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/QZ5FN2140364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782baf4288e50d7609eeecf007fc1b78195a1f4989e9aa663485e90636d5cc94. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:27Z), 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/QZ5FN2140375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b37392cd852de510aee25db2388485291399d384e56f272382377ffb103ca3. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZ5FN2140376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6adaaeedb58a26db9c1f267e8c86f9753942a7f82357c16f913239bb071e09e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZ5FN2140377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b2751fd95cce668fb30c873934af55a8acafeabcb973d4d7d81cfbaa4985a7. 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/QZ5FN2140378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d205612d64163c6385e1a64a4a49b58afcf5eef98550053caf27f64739e980. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:04:46Z), 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/QZ5FN2140387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe21e447400124bbb5b5372425d4c7ada25ec8de1db1ef24ce7a4593e643934b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5FN2140379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29fd6863df870a3ae6858e6ff725e348578d581d9a0753405aedfb65fec9fd2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZ5FN2140380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c6ebb6a33bab14b9d5322432daf08b5060645c1cb57c7c7d18e03b6b74a82f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:23:21Z), 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/QZ5FN2140382.