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 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 0x3f509c42f84a654006ac657c3e4b6b9746ae2ed68be8b8ce4162bb5856474350. 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/a6566c4b-a251-4909-91f1-58f7173e1574.json and https://artists.proofprofile.net/proofs/artist/a6566c4b-a251-4909-91f1-58f7173e1574.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 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 0xec0deb7dc38a0c46b492e147ff18727ae30a7c5804e50da0725135727fdc93d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFZ2245135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1d9d9b27bd3034a346e5160ff021fcf36a0b4f72df4607f4c2d21c151fa888. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAGA2229751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff676adcdebb6e0b6d0a65466dc679a402f0dadff404cb1e9b55df2a54e7b66. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAGX2354214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcec9bbe9d7f56c4e9e2691bc68584a4ccdeaacf00596253bf61744f8e70762. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/TCAGX2354256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a86d95614c6cad505ada84aa5806d82158a69813d08bb0c3e667632c733e6f. 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/TCAGZ2302524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd45eb11c457e55434b31fc4197d7906d7dfaa31443454fb7f935f373cd1cc0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAGY2393777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e24daebf6e4074342124c44463b2f6559357ad03f9bc0ae30d0dc905c5c4599. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGZ2319798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1f34fa98c48e76da82235a5729ab94499e8a2abc88c1c6b10506e85d1fc27e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAGZ2314029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c95e8344515a4392a96ca73693f71f46f6be35fca505cf9a4c3efdc54866b6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAHJ2318384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968aca3e444e8f413ca232f99f02e0c5db390d670e39cf6062f421f7d8959fca. 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/TCAHJ2318414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb3bc17c1c373b735e55e24d4b2f4365a657268be708405e94f8f24337cceb3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHJ2318468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b9b180e609871493d665a8a739f619f1c693f6c0ce5670781dfbb846166f3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHJ2318517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554d29a62cd103ed9a7a3fab2a279e3e3b7d9cfec385f914cdfba8b08d15ae85. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAHJ2318571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616642606c120d2c5cb6987e55204a5577d1cc20f91567e66f7841206d0c444b. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/TCAHJ2318675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811ff88cb3d8449863e12b17f8f2bde11af996ee4c6e4137b56ac374a46b71c3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHJ2318775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495944852fd72d8eb6267b2adbef046dc0b085a6d9196c47d7b936888231f9bb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAHJ2318789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284ee2bb6677e63af1f0318d8c194b3e82f04fd66f791a4acdbbf89a2008c77e. 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/TCAHJ2317800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a124589f8d62e6f12ecdefb907a1847b7fea4758fe88432b4cad58d74bb0441. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHJ2317831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5230e2800857652cef4bdef802755918c140cd3e995cb8c36df86d9988146. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHJ2317861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264b3da5d0962359333caec8700c19238e335b5d347cf6cc4e79d87aad791578. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHJ2317893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aabe49fe5fe3e5404fa4b9d91f1b468f647700b3ce2079de0255bd11c00dae4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHJ2317936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fafafedb7b05a38cc9a5c1e9d095b6d32213f031f3cd68b9c446d231ebebcf3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHJ2317960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c35c526d860285851760b99c674ddbba3ae00f34e3c2a438250d07085101bf7. 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/TCAHX2455572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cc969406d794c980438816cf5b1f718e3fbd29e16f2053ee81f501fadfd46f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIG2471123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d36734d284fda36259b0de8f87270227da042b3f408d32137dcb4d05ecf53fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIG2471145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e4c11c23cda0c629c505050db9f6712a5699edc72375d439e94d6de95d2d78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIG2471166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0e1e0fe7354db43d480ed17f435ab0bf59241eb7ca0f689b2da9f52695c805. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIH2471210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324fb6986f3e6f91ed3b7d39813eb401fddc2cc47c79c90c23834270293946bc. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/TCAIH2472787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ceb0a575c8024ef745c76ee8368c472192876dd81d54b1b72ab08802b9a41b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAIG2472850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea534a7d26a87014fa298601f0ce0bd941440e3fca9886e192eda3301c29b64d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAIK2455761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caf345844e4d99623a35a5a47a9084afd942f6b686ed0f6693e7bf4ab892200. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/TCAIS2406862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212e4458d5dac0da3c0691879d4a313922356440745642f7bcd6c8e55dd0e5d0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIT2436810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac9984acbe8c07a34a4aa3cd24f8150cc4739d93111ba7e339becc3d61f5db8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAJH2522134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f6ff6f2fd4105229557fd9c4cf70c682dd00aa26a70cf07672f48d62a7fc66. 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/TCAJH2522166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf082fa7845986ecbbefef221a9740d20b49e135d1bf962c1dd4eacaafdfe09cb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJH2522242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b996790666df043c4f77353008de05c2d05dcfefaf32ec63639b4f4536fb2a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJH2522250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e3435360cddf96d5465ccbaead1e07b2f88fe505b81fa86f091a0b920d4c08. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJH2522297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf614eb93396ce18cab732edbfc86bf8cc5e64dd7d0f8b01d13e8d5224ce364. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJH2522391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c3d5ad6ee1ba288d0251725ebf256189f01dfeaf6ae775c873773259e13398. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAJH2522326.