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 0x79b1f5a656674f36666167ce76633c1b38c7d356bb07ebfbf6415c2844475913. 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/2db60536-8f50-4097-99b4-2626d8161237.json and https://artists.proofprofile.net/proofs/artist/2db60536-8f50-4097-99b4-2626d8161237.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 0x5f7319e4602a8e236a3b56e68b1d1bc9c6a6ae1accd54c8037f1c8f4d53fa721. 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/BX44O2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f1b53a10939712eaf2301fbb58bb191bb5db68befec5465905f01a27b82480. 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/BX44O2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79760efcd49b2adf117c2c203e4df024b09beeb159347836d4562870726c8c2. 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/BX44O2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb575ede6e689cb512b8231f4f0869400c1f29046edae4bf3f24ccf2d3d834d8. 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/BX44O2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1857197e32fa33ca18619ab8fd24d9c01f440e629af41b52e2bc827a27d19936. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BX44O2300040.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc627110c535c3a30823120aa2f8a11796ff9b3096dc6192255475d1246e0952. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BX44O2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93ac7c3cbdcd9e3ad44ad34ed6d87decd43e0d0d40b3da9100f2f2e46b46755. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BX44O2300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665fa866f745834ee7edb47a7c4cb9e8ddde0f4d5095bc962990c0848519ba23. 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/BX44O2300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636f5e632bfc4247698fc3a4e3e21bac9275103722dd460d97e5b946f651c4f7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX44O2300459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b77acbf214a7cb954ec59bb6eeeb9d0c2b6665b578064d2e68c225db8e2690. 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/BX44O2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f121c01f438f0edf64147d62d9d360b804817fa9868e9876d4754217d83a40. 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/BX44O2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2233099acbb1058e68f3e59e5d1e9cba7c1ff4ea9532ed63f2a397811cfec3b9. 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/BX44O2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf249b0cee6e558c939c539dcc56b37d6290969c2d148b4f2b5bdc7a70996933. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BX44O2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5a815522b10a1ce9100040859750fcbd6331839415b1cb70224e4e469b16c8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BX44O2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78151972a99d721992b6662a767135362f3b78931fe74f507dcc2bb572cce0b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BX44O2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366773db683c0469221a95e66f3e06b30ddf374932b6fd5b05d90ee038ddf8ec. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BX44O2300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df83a49d68b3f059358165e4ae258916fea448bf9e3197b06916f8d06dc6783. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/BR4TF2300517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c3a9a69b7fe7b26642509ae617ba0007d9a46ea964b08aac89280073c75a39. 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/BR4TF2300518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206ce3cedf362c8e29305d6731d7f4c151a5bbedfcbbb7af40ec9907f73c55db. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BX44O2300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb1093181f8eb4b4399dd11566f1fd1ef94fe8d014de5fba11db059b660dfab. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:05Z), 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/BX44O2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a96d58dd14edfbf77cdfa9a3b7b86554c67b6015926869ed1389b486f54fbf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BX44O2300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0facdfe92686f1abb814dd6a96c93aff2e24efbf414ab7bf09296cef2bd1869c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BX44O2300591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f64dda71c37eb8996896497ef0c5bd4b6508ea3dd75bc398db575035df5d83. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:47:43Z), 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/BX44O2300593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f95b1ae4aa080cdfafc495fd84d6fb59896b013b7e3ecf9b635ab3b97c840f9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/BX44O2300597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb041bff2eba6f08fe522a4a2ccadb4ad199ae0c6cb32e544c54cd72d62d1bf69. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:03Z), 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/BX44O2300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7ef651ae8fc75f1e4e65f28240a8f807bad3dbe15f16ea58b328f81fa1dd45. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/BX44O2300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f24e9935c74359f6e9797f84324600478694aee65de786156c45e5ca893b552. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BX44O2300609.