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 0x409ecaf63ca5dc23c83f2326b813e6aebeddf8615465a6ddf61b4a1b916b2137. 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/5c4dcb3e-841f-4fc9-9015-a02698af801e.json and https://artists.proofprofile.net/proofs/artist/5c4dcb3e-841f-4fc9-9015-a02698af801e.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 0xc756e30e66f8854314fe99130d0b1e5b49f4d67b6dfb2d527bd6b4adf5bbb548. 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/QZHN52300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f93decc196db8d2060f4bc62b67804bcb8237c23afcd20e299510f871135fa1. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZHN92001279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd390d58d7d6adf5f43ab49f97ca374d1d3af4f4410a89afde533cf3e24257bc7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES52319282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005e6208bd7dcf361f2ea3137561a81da6fe578216a9e04b129a9f1992ef83e3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZK6M2094246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5680fb30a4cd037dc29008a44d4f9b4aaae87a992279a8ab4a60ad07ba1ea51c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTB72279143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7d6d06a65881c761b20292e85043146dd4bb8daf58aaab21466343e0e9441f. 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/QZDA62464924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2ab9206491a006b84bdb1f78e2008c2e118afbae83a3a1076fe75bbde41adb. 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/QZWFE2396953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75732a904a983fed55ee25056614cab946419914dc9beaa8381db59330734cc8. 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/QZTAZ2249087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdaf8e52700a25d2822276ae299ef59d928846b4484ed6d5d9d0fdd9dec35f7. 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/QZHNA2220577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf097aa13207974d9870e3ad4b4b22c2fa189e2bb14b01027b28edad095c0fe5. 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/QZDA72224712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a821d502041de09894f8dc6dd6ac7f4d44ab5576bed22becf2b19407dca773. 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/QZNWV2102813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e5b3404965beb7ac4dd6c5ce8214b2036f6e577a8fe339d0458ebbd449fff2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6J2159943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7d8fd484f1ea23e671552fcf883dd3443c0c90b61aa76c5e9007ff716c924. 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/QZFZ72103922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f6d5262dc1c3aee6b5080aaa5116976d91a31cb76fb6f09e530d46b8dfc336. 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/QZNWU2029002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f93decc196db8d2060f4bc62b67804bcb8237c23afcd20e299510f871135fa1. 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/QZHN92001279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8738ee26dcbd5739a69cac58e1ad196856d09ceeafe68215c3cc36ec87236fc7. 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/QZHN81969132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d58b869168f813ef4a01b7cb2210ba3055bd1ca22b5955c2c29c6b4c7e70063. 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/QZFZ61913284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec63507bf77cf4d84c9dec9e11afb2a96e60318d53382f155100a6cdec4eced. 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/QZFZ61913285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dc90abaf4f94ff2b59865d41723434a01fbe2b30afe33b05405557d6f39abf. 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/QZES91970212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a4ecd1a0549d6cc6296d3006f6f977d31db51dba44ed0dd1db5c6cfeeef5e5. 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/QZES91970215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40b88d2795bc6b24e304bfd9e4a88e5e80c261c04e358a975ae082074dbfadc. 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/QZY992300010.