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 0x9e02055073b17baae8f092835d71bcf2471f5d776c28d07f418c24061edac7c1. 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/e08f818f-c30c-4c7c-bed1-6b8dcd21af1e.json and https://artists.proofprofile.net/proofs/artist/e08f818f-c30c-4c7c-bed1-6b8dcd21af1e.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 0x150da247281dc7ae27c129f81f62b88b65701b35018dd4bed6b9361567213191. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIW2484159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b63c1f142343301c194f87cad66277b92643a69cf69181f099fdc615beea3c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIX2402100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7c9e5411bef461e15c983aa1eaf194700fe5b9913b68f9154b0996af311fae. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIW2494362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb483474ebf849cca6c66c5577cdc0d95414fb6c4b4db67707b1b8198081e45. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIX2402175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2bb158e4aa8d94cc4bd68593593a9e8c596f8e1b569cd3b160612ec880d57e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIX2423367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ca03fabaf8d3ec604526bc134a14991dc72fb7c8d7750acc801fcba1f07cf. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIX2423481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa217fc6b2a1534490f74b9fc74796201321863030e182898000cc76ecc04076a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIY2423292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be6d0e1ef0bbfcea4bd5bcafd2a1639790f1c108c3dd3aca47df60c96f3fe9b. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/TCAIX2429366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad1135067a074122629a00afec564c589f38084817c615fae7c32b454c1ec08. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIX2429470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb69a48760b24f549889ee106a000e006e39dc4338017fdd5ec1c0191a092fb. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIY2486021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c7a43a8969f300d53ff40d9bd43b1c4ef14c7c57434f8c90d3160720fd07b. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:28:31Z), 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/TCAIY2485935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1420ae0858f4e2890d81534b88d8965ec0891efe6af9599a2ebcb49eff3853a3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIY2486054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df40bc5ac0da24321062f4ec39bded92c22229b7efd6b6922542107e3e64c46. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIY2486097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01396d05f28fa363ddc67390a1f16046937694a8da204d180e6caa956c680eb. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAIY2486146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743a0b4ca38870a7578e8a8affb0c410a77c73da45db26f71d8dfde4315698cb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJB2489077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d06d6ce64f748e91b24ef3b82f55d0f044c4fe4dc7d6945137dec8aa889faff. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAJA2488981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750d2d8f4807ca33814d868997f90522c27cda977c04602ef57b3d1ee0fb0a3e. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:05:55Z), 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/TCAJA2488900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa9589c5947bd2d7c865811f9bf62559bfb2e2467614be0d427b2766dabef54. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAJB2489032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15463c6a0e5cb137ec8bee872f1a6e96719d6f9de5a4137ad74e058ef9b22c1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJB2436161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3244cd93d6f2731b31c26e3eac4fc073c3b55dc99cbf9586deac1b22d1fa9980. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/TCAJC2436215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9399907a44c9d2e111896188e1c54f4be617ec07e27546f88c0fce020f3f0c47. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAJB2436366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666ba8cd12bf081e8a06bd9381e3c822899ce73a8da1ebef781e480a33efb203. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:26:56Z), 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/TCAJB2436097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0989cf862d79fd4e56eb254f0d2149069194213a2ea2810e38068c9d848ed450. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:12:27Z), 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/TCAJB2436277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f67c90a58131a1f0cebb0bb23d6a7ed745c373edcbfa34134836a273280993b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJC2465724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40992421f16906bf8df22de54e0184cbd9233163c55c46a054d690093b61f188. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJD2465865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3472b39f54935da4555688f5b869a1234fcc1cec0c0eed9b8ab704ca910def0d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJD2465811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978f3b96c432d19737adfeca7af8ef3f17324927d1ee7160b3e7099bce1c8089. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJC2465587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b7bb48903c83b1cb941a2b6d50b51f0d254463b6fdd79eea86d5ba4714c71. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/TCAJC2465658.