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 0x8cfc68b7528576041d2de30eddd39b76071d9a033758d5d9e9d0750fdb6dd2cd. 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/87c4faa1-8d4b-4ffc-99b1-a891ede5a944.json and https://artists.proofprofile.net/proofs/artist/87c4faa1-8d4b-4ffc-99b1-a891ede5a944.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 0x7f2958498b8659115b2f122b2bd708a8dc5948177172a65c87539fdebfe62d56. 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/QMANG2238393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8487ca1938c54f8c39541fd9c705dad65e4b952e2f1099dec4a5e789ebf4bb7. 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/QMANG2238396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd709577b74eac98fcdb699f4404e6d9e17cf6a69feee962b8fd2b71255f3d85a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QMANG2238390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb40e4905f42f10ff186ff2edff5a10f4e3eb65e3795c222d6f989e548db2dd. 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/QM3DF2277801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2bdcee4f642e8883b5fe7ba444436c3fe845b27477854eb3961a6fca673230. 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/QM3DF2277804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b78a7d45a73c31043d648b99111029bb96be7ffaa85663689b04fba414054d. 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/QM3DF2277802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763c188a6a1db1b07fefbc367ebd969efe30583f9baccebe79b9920d45a5b9f8. 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/QM3DF2277807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c17e5b586689991face00017974e0292947441b6aeaaea1b5e3308e57036ec. 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/QM3DF2277808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016f2cdd1ffe5762de6233939af368ca409dbb8368262d29358a1550ead99b3b. 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/QM3DF2277809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610fdb05f8f63cd58f3378e6baf3aca1922353b28ce0cc8e97cecdf07b03a9a8. 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/QM3DF2277810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb184be848106768542060fbfa728123bdede77a104812508557ad476154436. 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/QMANG2240837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b78a7d45a73c31043d648b99111029bb96be7ffaa85663689b04fba414054d. 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/QM3DF2277802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb40e4905f42f10ff186ff2edff5a10f4e3eb65e3795c222d6f989e548db2dd. 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/QM3DF2277801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7217c7b82a7c4c437d0cb248c7bed7306e77f3f6c52f1559cde9e60302d4bc2e. 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/QZJRC2262716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b14e2155d12c74772871468425c435b744da3a06c4a8780a98991adf12a4e32. 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/QZTAS2253090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb121d8a6cb021b54eb7ed03bb940fd34fae6cc2060752440a1b9610787308a8a. 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/QZHN72213086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7de3213971199ceafebec3631ea463929ca11e7d78d8cf644fe25137bbe9c3. 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/QZAKB2166263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09d1751265deaee2997f2a4a7ad8326ac6426777ca36a698ecf724e243ca946. 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/CA5KR2218755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa804e1d35f82f81936fcb6c9470ddb4bebf68ce0e82fd056c5ee075632cb5ff4. 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/QZAKB2160158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c6e2c498493492a45ba11715445dae7eb09f7635f3b79a59cd64af93fc116b. 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/QZFZ62212853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5aa5366b648aac07c210e745b85d7262877b05070d13aa3b0ff46ec89b4e07. 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/QZFYY2288966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994b970f003be8c9d20cf1e3e8eb354baa20d79670ecc5e1eebd3cfa5db0b8bf. 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/QZK6F2194036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f715de71cd4dc85b81a09a80ecbfb8765e29ac2141bdb28e5a8816287c1f2e. 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/QZK6F2194937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61540fd763a92720c251d3a212e494e892f5bc06eae4114e0ae586fa5b5d7820. 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/QZK6M2184852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540d2b6be28e28f579e6d86da3e031094311d0b76bbc4a8cdf00266abc105198. 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/QZHNC2139666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3506f9ecfbdf504dd77df79591f8eed4573777e850b7823934bc288c7917cf6f. 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/QZFZ52167363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ae0a660f030624d8cc431cefbf866e231b3a4bb33305b7e79e597344fd87f. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZPLR2004347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e9a377e93a40d986765b6e4f1cb1e50c05913bffb756a99c6393246671c1b. 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/US3DF2437480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2430230d1356a333a44be83999b10c82539d44b53512ec8f12d5f2d410e8ec6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFQ2388680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7a4981db2e8485eb0c44e24b46db7ace7a19b5fa6491d4e063b440cff6f5d9. 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/US3DF2415442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b895cf0b2f30616312a8219deefb875f2abad565878c97a255106b5bcfd1b48. 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/US3DF2431889.