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 0xfc98185bbbbd6d49150348734f38a3029d1c8f4fb9a1c8b8796ff5ca210068b8. 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/2d39c936-efad-4dd3-90b7-b639da682dc6.json and https://artists.proofprofile.net/proofs/artist/2d39c936-efad-4dd3-90b7-b639da682dc6.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 0x0916f4a1b539dd0e1acb99bf005a12a82aa432f6ccb2501bf7990456aca49fb7. 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/DGA052368986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5fadd752dce655f7ea90919c8bddc37eed3a3275a051f1d82d44f36edaf14f. 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/FRX762301750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b54150b19bd6f67419886d293a8b0c96b406466b94b8a7408b9f86276f1993. 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/DGA052368988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282ddab4ec7c5bd25e2b894954ca6d2ac41b1c4b370d26c25851d1f4e333bbe7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA052368989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cad9e2a08c47d52c1e61ab880ffce5e5a5eb7b809b43f2a6e357176479376c4. 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/DGA052368990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44557b54981cf9443298078935882f4597b0cbf480893eda00474de77bb5bc2d. 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/DGA052368991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2acfc4d3d0f71948383a77f76646acdc147adc2e6a49e1e47cb2ce1c376c5d2. 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/DGA052368992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d14315e4ea593420f60332208c93f80148d537d2c8bd731b970104e013c1aef. 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/DGA052368993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf943e8ff3efd7f062e9c5054616b831fab1793a9f16c8fe2db43455d322a7d91. 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/DGA052368994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04607da23be2c8225fc20fa4433f7ddb9002dc577cbedb997bac278579c27f55. 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/DGA052368995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88c4a335f07bd68a0376c138b1b35fe15419262a3c3e9e4a318cebb0cd3b13a. 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/DGA052368997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f2122567d61e5ee8a1fdc01c3e9757ce65611f124c62353d3fe2dfa4f58ecc. 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/DGA052491406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cad9e2a08c47d52c1e61ab880ffce5e5a5eb7b809b43f2a6e357176479376c4. 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/DGA052368990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5fadd752dce655f7ea90919c8bddc37eed3a3275a051f1d82d44f36edaf14f. 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/FRX762301750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284907ff06a450114e1b07ddeb54a2bbe932d9a6dfe054a7e63e1512d793ad2f. 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/FR96X2209725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f51191b40627107f9a50852df77e582013fe2664eafa97066a3114917131d6a. 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/FR59R2233281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dc33c41ef2276b4057ad4c0d74a692d69641f2c2b3beca9cccdb677f707099. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X2209726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd5a74293d69b0a61bb0279be39d9bdf873260470acd47b1c0e48374964490e. 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/FR96X2209727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dbf041e773b7155c30fb97d916dd7f22bdc86c3ce440bd35e9917875ef3f14. 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/FR96X2209728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd090ffa863464a0b803421a034656b42b8a6ff48ff5e68e4fadf5bd60e97eebb. 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/FR96X2209729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05d1b8f97037e462a5bedd401a6cf7c75cc05d9cfce614b8d9c40350f02342c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X2209730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f51191b40627107f9a50852df77e582013fe2664eafa97066a3114917131d6a. 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/FR59R2233281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f04b09252664175ed7dc1357d8beeada9d9c9dd4fb68a39ef44ecffad2780. 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/FRX872195544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e92b3ff3378d8a8a26c5f3de11d1a3acc5ee21a2522eab62b7a9f7df2388234. 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/FRX872054219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e35f9989f84ed86fc8fc53bbd92fc0294c09b2ce5b289ea033692a334a37ee6. 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/FR96X2134056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ff2ae269ee261853051aa6d3d66b26f4bd57a19ef3a452a24bb4f35b25b404. 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/DGA072132467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b0fbb546f1b8537fcf7ebadb5391035e0b4f598ed0bd63034897564ab3b32c. 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/FR96X2134057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0b936bf5133eca6f8641f204f02b3a8913a77fb6819c07d2a8aae12d25f2d9. 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/FR96X2134058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea3a8155b0ed923914f0b4a44a8fcef12fa76c0309a799869c792eec1e0a28b. 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/FRX202003749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e69c16154b3816b98ec3dad8c9713124d8c3cb70b70d0a583704837e4c4fe8f. 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/FR96X2134059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ff2ae269ee261853051aa6d3d66b26f4bd57a19ef3a452a24bb4f35b25b404. 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/DGA072132467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e92b3ff3378d8a8a26c5f3de11d1a3acc5ee21a2522eab62b7a9f7df2388234. 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/FRX872054219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea3a8155b0ed923914f0b4a44a8fcef12fa76c0309a799869c792eec1e0a28b. 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/FRX202003749.