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 0xec85e0446b95f26bbdebc3308327fdb44bfaa7949e69b0512342d4ccdba90143. 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/bf3dc129-3340-44f6-a016-a7e37abf355f.json and https://artists.proofprofile.net/proofs/artist/bf3dc129-3340-44f6-a016-a7e37abf355f.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 0x51187c559b728a111d75d999815659548a5b87a71cc565ee97867e69e30f1cd8. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6P41434882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d41e5093537b118c92d07a252349c7e5b2d7345ed7d34f64da58e0b24244cc. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QM6P41434883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240bc264b9231fedb7bd12673f4f0a8e5ea2c6fc977cb413e2601ba00fce03e1. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/QM6P41434884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffe8441811b4ffac68141fb3ec756bc9b9e121f2d2257c377cad01b7ae5c879. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6P41434887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddf50c9f8d9e194a64579bd246d60d8a92d3986b44081fbddd65ca53fc3b310. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QM6P41434888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73a8c3322611676864f8614d7d21a791b5e2cf000ef29e43e8383d8772a979e. 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/QM6P41434890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa8d2904630e1b2e237bf3facdfcd160bcc4899c6d965c35061ebaeccb5092d. 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/QM6P41434892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278be498363239434ef706eec5ad4a19050906b07f0c0b47c09b185b5943d3c2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM6P41434665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c3f0e8f94f34c1d868c924c4057ac0c3f701d3e3854d4473f4aa9d73677bc2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM6P41434668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcd503139a24eb31b6acf2596e29a3b5626ff395d07a70b03c726c6206eb72a. 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/QM6P41434671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb03d22b5dfe02dbaf42a9115f2d849206496e4ef6d2aa636a4791948503a83. 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/USA371649938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7988c569430aca298a91cb9a1bf51158d879970aac04d20975dc646a47c98ce7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA371649939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544471f864d7d7af9dbfabdbd84d5579ba0f6f433f5cda8f81a557a780d0a897. 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/USA371649942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1f068e35024a0750bcf744d07cf41cfb24dbed92cc7f1bd7fd91b13b7959c6. 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/USA371649943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6827dd57c33399d861b476343f9067f93d09e7388853422e61f9b7100212c8. 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/USA371649945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd44335e7d4cdc95e5fb46256cd0779aeb145b8560dd30d3c3bc88147756118b. 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/USA371649946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a904e150fc3c0d13505ed8a9877ce3e878a6d5e95d01b9615f3f59e56cd5ce. 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/USA561125396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4323cd262907acb86253d82f6b9bb3c6b48ef913aeb68b36728b8c2db46db09d. 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/QM6P41444040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962318e34f6ec74576cfbb26a2e7579c2035eb2c1c2640d9bc890f50ffd254ee. 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/USA561088161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100ace569aa08a2dbff4d6e001a1fe901c4e6ad2f1028d4e547d8b155ba6fe51. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USA561088163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc036d6633500f74baf1e7fc29f0e77cc45cbd159880ec2dbe3ca4e5616c707d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USA561088164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea05f447c1e5e0695ad35becfb94538aed55554b0475b016778b4277ed5b8c49. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USA561088166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa419ff4487af13d7cc3d3de082fd47ed6656b41b19b68f611cc4d4d6ff4f924. 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/USA561088168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff437c7658955bc14b944180c3279500d82f918f238f42496aee239e2b7708d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA561088169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707cec01fcfd0ec763baab3020b30e699d54a5dfb92c23d1c25e631c4dc0adc8. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USA561088171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153bafda2d86469f293175a14100c12614dfc273f9d2a6e8fe87308c07a6b312. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USA561088172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d67d107e1a1a8e96193c89455f2492238bb37b878129267456e9c24147467e0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMFME1407801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c28597be2913408109a19b95bbc29a41160716cfa6a3e006d7ea329bccebc5b. 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/QMFME1407802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab65ebed5ad347ee64ec0be59f3aa08cfc6726fb58c8e5990152350876ca0a1. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6P41431361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1cb9291d4bbb14d41cd98dacb77f9ef97e2f036d13bed475784f2891f1f715. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM6P41431362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848756433bf93c953e935160fe16ef41996c230b8e6ba2264a8061be80497e60. 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/QM6P41431363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f2bcc1d5b9c0d94953c02756b43dc6956108783ee73278eaa319744109122c. 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/QM6P41431364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499bcddbf27f60ff2ace5ea13519719f0e9c5a2f6f43b0585ebcab7c608f8acf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QM6P41431365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3b3733c63aa0214e77d60c94343fcf16443ee4d74c234c3e4a97b74bf1cd31. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM6P41431367.