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 0x63efeb3a9f8b3e89461d7e6122f2b6a461e7882f54b4893fb56d8fa7995f3686. 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/0277a1f2-0265-47b6-9499-62ccab7db512.json and https://artists.proofprofile.net/proofs/artist/0277a1f2-0265-47b6-9499-62ccab7db512.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 0x91f0a3f0df80fc3940c9d1eb71378826ed7f0b3d3412640f8265a562129aa07c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB42235239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd19f430241819bb4891aedeb9eefc8bdf2d237bf27b546eb41bdca667d4da8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYX2375898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda6fc7f50fd85279b31c7e911f5179aa120c75b084458eb6a351581c25591c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTB82284913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04178c54ee357b2da21776516143bd86327ab785f931564f9939e4729bbba3ed. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZFYX2375895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f3d66e3d4690fe8da74e03c78702c6f3d8dc77ac942f3b45170bd3a8e612a0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZFYX2375896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faf4fb9508a3a4f68a0e2c643c5ab42902382f2162de6afb9cd9878408760ea. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZNWV2204551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d887fd83dc601e09ed644a2f45ac6445197b57b7d98fac037e40035550ba55. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZFYX2375897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a376d9a7e00424516d84ae585f6d009232bf079fc18153e1413a1e1ec92b61d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFYX2375899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed26b9cf77e42a52cf56c2ea2243779923f0b5a456be7861a8de2dc0a04e7d7e. 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/QZK6L2477609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b13152df369f4355d118f533d65c84a49219dee93dacc45ec9dcf6a7a13404. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6P2455740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa12835798474b72408e33ac0e85fc08c046799d01dd4a069027edb2dd8b3ca. 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/QZPEW2414234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537aebbad659dcf00af4bc89883ed2756778e91df0eb6e78b3263a4f3752f405. 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/SE5BU2473760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d21d5cd1f08dfd1daa395f8bc30c1321eb4a55c0ac5b3fbd6c414e46cfc510. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFL2386167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7fe423966a9be74c4e0e92d6683a9af1426d5d610fddc6d81ca4315faf573. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:49:50Z), 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/SE6TI2348621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6d55e2c877f55a28d4e813bb683f85756625b27052d699b5e260c7ad00d3de. 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/QZTAS2337979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbd320e7f16d1995f175ce0d5cfb2cb1e1d900fbc2049a8eff0b55ee17eb39b. 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/UKZGC2305367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d25da6905de5eaff0aa44de15d1273e3bdc22b9717b336aa5159b8bbb451e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEN2380664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2608f49e8b052b6a7f6d6e944cb37d340ac567dcc9fe227655e1e35524daa999. 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/QZVEM2327672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841037fb4e0d44216eca0c96b36774cd84af4bf3ef86f9141f4e415c0b2ac6f6. 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/UKZGC2302783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879300b3055251db853a7d196a621af694ccdb1266fa1948bca386ba0074aea6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZGC2301484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0a3f0df80fc3940c9d1eb71378826ed7f0b3d3412640f8265a562129aa07c. 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/QZTB42235239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f91aee6a05c685cc6e8f8497ae9b48d6b3fa13cc21cb2cc0f39ef475d399e1. 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/QZRP42223937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a0dc435f035dba60a3cae8f7283ea18a6b7ffc3dede5ebc62faa9d026a889e. 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/QZNWR2216155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b567a750c51a564e56b294ac67d87e45c50f9426ec0eb48dffc8d247b04b3. 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/QZK6F2270740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3506f8da2fea633647e701efc1bd61d866c87304d8eefb0acf56437943dad8. 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/QZK6L2297422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5e3b318b23963e50eebdbb2785c60ccbae70681b866ac86b17266eae7f5f5e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES92250044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535418394bd02ac92815eb9d80878fe8a6dc7ae5257591a23932cbb0209f12a3. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFYX2239742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa59698f22a028c5266278f9f7fdbb62b86925db684ff738f59c0309d6cc20e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92191476.