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 0x946645743abf5a76ae270dfae90b8f10a36bff54cc373595faca74e6c6d08b07. 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/fe6176be-c74b-4671-826d-2fd0aa00ea95.json and https://artists.proofprofile.net/proofs/artist/fe6176be-c74b-4671-826d-2fd0aa00ea95.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 0x05bb36cd069c352ff3520a656af1374d42373564a02e009ab709387bc88d52f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2138879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d9f805bd3c9e02b245f0bbc601f4bbd5b053edbe22e271f706ff837783e361. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES71G2138880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856c1e09d70f286f5f059fc44e618d1e29e4b52ded76fa65c694a6271af582e. 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/ES71G2138881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ac4b80969b74e9a028f3e305bbd0ef66a2c9de7d9512e282472eb0a47aebfa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2138882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf347f847236e66bd8f4d2435ea537b948c866a18db593d503c3a81b56acffaf3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES71G2138885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750f48f7bcea553f73a357cab78e34b7e49a37310f0f86b44bb63548504dfd9b. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ES71G2138875.
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 0x3a532b93929c4bdc709cc0f518e9be6c9f2d0e7276671690113aaf52a09581ee. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES71G2138876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b1d1853d8aff8c37ffaafc4fe95f106357c3c1270078274169207857b7506b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES71G2138877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5826c9c59ea6ae818a82d66175705f569beeeb1ddf802376eb21e2276ac141. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES71G2138878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87ff515c60eaa8e1e8349abf1342864e4e44d4c566b2dc4fcc38767e04448b3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES71G2138883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02afc9c32717d50af687e155d08cb98a473b54c14e5ab395409a14bf8805dedc. 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/CLOB20700413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe631c2a04710c675fbf5929c70e00fd11453242312a0902f3320b9bab7c65fa4. 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/CLOB20700391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576b3672da83084f1223bc1a76d8e99bf455a842a56c1516cc7a8de166813048. 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/CLOB20700414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa47c8fe8b07910e6f5f640b2cba111015b9cb14a7127852d93d8f1360bd5d94. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CLOB20700415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd63f6f7bceff59a803f70864a176ac9206aba733ce44cb361661be2daf95ef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CLOB20700416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71d9a7970d46a3ecbc211e605a001785521a2c6896bccc7550bc8fe671653cc. 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/CLOB20700398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7718399a47ff59888ed8867d2a5ef007ef76fab4a5ecfc3ddb8f2f7e0922489a. 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/CLOB20700417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e90a055e5102d771e593b44e372c7d3c7447303e964c141f23efb4adcffeb2. 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/PEBQ91502962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff033fe5a4f0ded2d7abadb7a7ac032a0042b0cd141431d1b1a4d6f7087c226f. 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/PEBQ91502965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca658d5fb2144b03b355b198ff081da441ffbe506dc3a2d78cef61918054ee9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PEBQ91502966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503d28b5a9bc3bb6a3ebb5f3cc080111d5a5ee626a4a1638bd18549a9ced2a36. 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/PEBQ91502967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf215589ddb83cd28ed5eff86c6ae93b2312da616f3c5910eaad1565c9c3f0635. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PEBQ91502968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425a19e7cf0d50d79431292b55204d580a63289142f27d65fb1068d30a5f2026. 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/PEBQ91502969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce04302b176b43c27b0efc28e0c9b7190a60bd87ed7d61aea8dafff2dad5fd0. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PEBQ91502970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654bedf71bea2cf1bb44ec1b57df1142e001c1fb7f321ffcbe09cd13e736fd03. 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/PEBQ91502964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9562f910a66a03abeb2c7f194cd06e2bf40a45ab91044e2633eb4f3b69884cea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PEBQ91502963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff12b16ea303e21ae435a5f7eabeaaeb579bf257a7357b5a9b1310ba8881d3cd. 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/ES71G2115996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb126aa75a877ee4498d56f0078e21bc8282df1d4d63ff5ea695fa2362f65ea15. 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/ES71G2023624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91cad154877d307e7d8729f5b7a195ad1ea0e37b69bb9202ebb83f3f7802f19. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CLOB20700429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5fcf93e464909d7a10bf16dbd306700f1c4f0c02620f25c9f17e4f2d52ad08. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CLOB20700427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8444198ee5c7e03a5a3c7def1d2bace8c6570f7d7975ca69bc9b9302afcdde. 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/CLOB20700428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91115665a2db9b4c2d06ec8b426ff2cc6430cab8f4a4bfa26b2afe85dd6e2bfd. 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/CLOB20700390.