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 0x572ef6afbee7c0e4dc1986faea8039e540dfc68d5d847b3c50488cf8b58e9f4c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f63cfbd7-4e60-441c-a3d0-0bf96321dccc.json and https://artists.proofprofile.net/proofs/artist/f63cfbd7-4e60-441c-a3d0-0bf96321dccc.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 0xfb3b456ece548006bbda1ef781768efc938083147285f03b71b17c3009212c50. 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/QZNMU2514961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69170aa5043d14e2e0603cc12e29e46af60bfbfcef739be83a69f19b50b347f. 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/QZNMU2516907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99576809b1f43034b121d6f8f6bdd259cb2e86b94834b87b73a67295292ece45. 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/QZNMU2516908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaae62f4eb47ae9af8e2b16f261cfbbad9c9ea3b1b0e54528dc70aeb5c612b63. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:29:52Z), 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/QZNMV2508132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6701c3d69d36dc2519c69baa58e1d167f91547f2b205c4ea725478b3674240. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNMV2537013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9ee48c32dde84e43fe8ffdd4f6c8c3437075319187441cb9f8bbd7f79f9b4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNMV2537014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ee657b426b334b6a3513c267dbf01bbeded7684fe7cbb6b5ad2372c01f0588. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNMW2516123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42faca801310e84b8c6f66121ba0ff040145febb2f8826cb807da80d13bf9e99. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNMW2506874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6035234195a95c88710d925e17b760bdabd212a98d8bcc9d3942adef3fcb5c7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNMW2506875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9152115c67b3e321d6a1f77c9cfd5d5c8a54ac18a9cd498f164bcc1e57f4799a. 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/QZNMW2573960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1581d0a3188b50cef44a8a498d9b9daff8393ce4560ed842402e4cf89ddd1c38. 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/QZNMX2504273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76a344a965fbbb7f8d7693a68558196eb781d1a4ea59535c190291b1dcbe379. 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/QZNMW2580451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dacfb834d959503eb4769929670823b71dd7c68ee496cbd8a506b185fe8bd1. 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/QZNMW2582500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fd2bb580c8f105d1e592ffed4f9db34d6ae773de5927ceab8d8433e2000365. 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/QZNMW2580446.