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 0x36b3b94f526de378a86a3b3ba301c046a23610304b0db7cbb2ad78d975cce19c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/603438c9-f693-4f01-8b77-ba4f2767f43e.json and https://artists.proofprofile.net/proofs/artist/603438c9-f693-4f01-8b77-ba4f2767f43e.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 0x1f1f4c799d9c18546e23db5686e82a79a29937d8d9ae1b014607eb4de2ed1186. 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/FR10S1946936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a69960807b298895ec080ccc01561a16fabe45b45e542eb4d623eecf2474d8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR10S1940296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11ea9ee3d6bae050bcd019bbd82be768edbeb228c2a30e10b3885bb1c2fe9ff. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR10S1940297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b03ca383848964b46bac6ddf4fc5f235b0775e8d21a36a695b1afe81e12996. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR10S1940298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3345f40c14ebfdf2a12dd33d5e0b505dac240d2e75d97ee53546e9e1bca77a3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR10S1940300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729b5634e5bd1353513df6541d276f2264cdfe57020dacd06647828eb9c05520. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR10S1940301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67359ac10ed4567f8b653d23aaaf4b1b69366a026ef1ad1dfdb99ce7c94d0406. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR10S1940302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8832234e84873fb5ea5f73cf345d817eab928407af5b727dca3c34e0c2fe39fe. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR10S1940304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420ae4ccabbf99b7276b80dd97eed9b63e6315de9b1e9d243f53ccce2bc38db7. 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/MYIS11800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fff54717fdbcdd5f2d7c937b717c24613ec3ef9736547c56e92c2f1b5004e3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/MYIS11800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab5e37c05d6d858fa960117f3495aa31bd71b82ce8aa1bc995a7189343dd822. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MYIS11800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcf4a5a69d93940038fbd6b039341c2f1d54bc40f8d5af063b1142bcd5f77a9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MYIS11800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a51a461c7491348eb9950c3b93ca4f98f273ba6504cc34a07e0144a87be15e2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR59R1989107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf59b410786dd26428717dfebc5971304a92ade9049a48023251d26f842007cc. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FR59R1989110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedbcabbcc09b6efad1224c47fb605725efac833e2315f26e87246b8adb2f96d. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/FR2X42064184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80551d46b4301a46cfc70c514006b1a46034754c7e737143b019acb360bcaae5. 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/FR2X42064186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3148053d76c20ddfa17601802defd07443e12ce820c368ac27c39b9a10a2b9b. 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/FR2X42064190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2cbadd14783a202c35dd83ed1e4f2bb6313f75964b48941e2735d80388861e. 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/FR2X42064191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182493bb503ddfa0ec2a5798f765b9013c6c35c897cbac9f746b538146fe16a5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/MYGX11700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728f90cac51566717906c5826137dc39c47dbfee82a33b973ecef4e451f0ae90. 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/FR10S1942768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3eafc266e669e87d2a59cfd825a860889fbdfca97279f2b2cdfeb4547b6613. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FR10S1942772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41f62368959394e3d7572a8b1272e2a2c196d38b4a25b8a534afd9a055f7af6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR10S1942773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c5afc15693964d5491467f67b18ba229d4a9ce600b8af0c7e481f0473aec13. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FR10S1940306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c4e4085b806a3db319b7a48b46897b7ed7ff4e223802236f8bf5f7b209ca78. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR10S1940308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4c9ecbc904b5738520ab8148b6ef87281e5d35b9388102c03a2c471ce02384. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR10S1946959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79323c8a68bfd56b36ae0ecf8df4597ab2621620910e1cb1b66ad4dfe352b438. 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/FR10S1946963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9692d55396bd01df3c7e14afaadb2965d1b7f128585abcba84a3760ffd77f8c9. 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/FR10S1946965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea84cdad94269d91e61e44422e867c2dbbb03df8adf0a3d620b8fed176c53111. 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/FR10S1946968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8a93934a3695d3945c868f28492dd2cffb9e152784e2e2f2bea2cbb4bf880f. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/FR10S1946961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bde45cafc671ee4374ef53180ea542e09600ad1c553c3a6a763fb806af8449. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR10S1946964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8396eb841492c49f956d07396e5a88f3023d286bd7f9cf30f310f07693945b4f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR10S1946967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8de9cdcb60a2a1413c41f805bff01fbc841ba76193a266b527f3f859a4bdc71. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR2X41904625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb502eb911dd8676802c6c1f46e11fa84a2ed796e7f7d458d8701702cb415f775. 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/FR2X41904629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6226d5ce2dadc274063688c9f07706f9f180417973b33c30d5297815c270bbab. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/FR59R2068789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fa15723a2cde445e7f530619161f53deac1c5614a889a8eb2a2e1303e9afa9. 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/FR59R2068792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30402d43d2a47bb333e33305dc6490cca75e1ad3a23249bf8fec9d338fd2c2a9. 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/FR59R2068800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d117891d941b51e8075962c61a605cd9e0c059a5109bc1c448f2fc42dcf4f5c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZYHM2367520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec4f70400f49a93ff04e9af486f430ccb7d20d9e0782535c7af28e1f8280411. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZYHM2401906.