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 0xd99c81af0aa978a94e4e68a09cc9d43cec57854285f967b17227ebf6ac764362. 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/506c49df-f643-4f94-b814-ba2f04f1114b.json and https://artists.proofprofile.net/proofs/artist/506c49df-f643-4f94-b814-ba2f04f1114b.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 0x43837a1eb26e89034e54c3087640a298d5a46a71cdac3992ccbd2aa8238b058b. 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/QZK6Q2387042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8b58337689f5fd4f796bf2b6317268e5ba6a270529f329db2204deb482c612. 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/QZK6Q2387043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869e7257d8b79403b54436c3941b513f3eda03fe901a40d3ec6b0b58b431c2f7. 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/QZK6Q2387044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f95b3fdf7141a59191955d60a51785953ebba1002b02a6b072e05c3ea7d4483. 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/QZK6Q2387045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf833c13d650cbb925e30e6e3f8263952e0ec287da9171be09b99a4e60f91784d. 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/QZMEQ2260744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf360b9813aadf89790571c53a09ae969b500bb17f64003fcba8833925e719c51. 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/QZK6Q2387046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa694c0d6a2811b8203236df43b577b1f28b49681dca785c26c53b8d01fcf8fea. 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/QZMEQ2260743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8825b1c03df138c9e67f96057fbf7512cccefd99132b22bc5ac6652fc70ddacb. 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/QZK6Q2387047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e98a0271aa0fe3f3785e58032cfb4db539a21c5c3d543a9b7569cce815e06df. 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/QZFZ32463551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc16694b6a728842ff65a60a8d3d3e1fb01324c543806573c4662d0636bc2d2. 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/QZFZ32463553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84b1ba124d69508f923b43f9d8b05d59b4976a18f4962c9c19b5d61df757761. 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/QZTAU2385858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa694c0d6a2811b8203236df43b577b1f28b49681dca785c26c53b8d01fcf8fea. 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/QZMEQ2260743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf833c13d650cbb925e30e6e3f8263952e0ec287da9171be09b99a4e60f91784d. 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/QZMEQ2260744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d72135b94491a8bf27895a8ac9276dac5c15019a7ea8add70c778221b2a42. 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/QZMEQ2260745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4587fa501cbf50bf4605faf14bc9b6d21021d00b517a060a8a542a11de64f004. 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/QZK6N2113055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa305f5fc790ce28ff0846f50e279ce3d3f1b500e3d74632ac7eb8ae2dbbd1d19. 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/QZK6N2111670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90155cb5b1b8f5f854374af998f8b342375c601f15bbdf3066fcc389aa6b8c9c. 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/QZK6N2111671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4d885a207e38a92dadb13c7d5acad2214fec122721cea7189b2e67d02efc0d. 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/QZDA52095795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3429f016126e1309b7faae0ba5b33aa7b5026e72b500d734fa5d9c7d84913c0. 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/QZDA52050697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5440437efae7e07ca532418df7a76e6bf8c6e02056d185002e08068cd2e9f9a. 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/QZFZ72073791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5056a71f1ea49194f14e6af1a510ed68955d1ee91e13724f1801cc24ffff089a. 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/QZHNC1959435.