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 0xdda3941dfe07d900c2d0814bb3640c66c0eb2efbc1da1b3f078159f6c65e98ac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c694ba35-f345-4f69-8064-e431270d2f05.json and https://artists.proofprofile.net/proofs/artist/c694ba35-f345-4f69-8064-e431270d2f05.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 0x227e2395801ff5df5f1b314015aea8a190eafad25071f45ab2a30b92973238db. 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/FR96X1970592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043908264921aed05ed42886180096e99ff86f6899f281aad251b985eea202c3. 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/BXBG41800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717aa5b81eac19e2b9d94a4e66dd2c6e5e39a2e2e07577fe7afdf765d85a75b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXBG41800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7e62b14020409b98075c6d61b9a1c922c2915f86d5f54778dc71aed457482. 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/BXBG41800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83c32473cc44e326acf3d29061e31549faafc84ab58d269ddd849508ea60500. 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/BXBG42400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52336f9d46edf4e96fa00da49d514bbd54aae843f4c6fba4992906505dc1c4b4. 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/BXBG42400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a19fb6543efce86f8aaa8d29457f4d874a3274b0e6887dd92d0d91d0ee9690f. 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/BX1LT2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f76ee921149160349235aa5309c7af3b28afad4f41dd7d2428fe3cf39ea58d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXBG42000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c90a2e89ac349b6603cdeb321bd654f92922ba3b8ee38932f8cd96dc3a3fc2e. 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/BXBH22000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73978fdf8f9b229edd46d88a11ad36f009b7672028a336413ec2620ca1bc4a1. 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/BCGXA2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6579a73c02bc16451d4b08cc5bfe06b1cc36b5207c7b3c6fcb68950626bd5961. 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/BCGXA2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530cb934a44c0255fef0668d83e546d506c04e38b8a05273f1257a8781c5543d. 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/BCGXA2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21f846db119b36ee425d0cd72652ea2499571968c8dabcf4aeb80fcd759c70a. 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/BCGXA2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686babee55e06e673ed31dfc0fe2c8b1baca5af01edd8f9befe9fe30aa638663. 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/BCGXA2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27623358ce13cd89873504490251f15afa4903ebe9bde02895ca62414e3a8069. 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/BXBG42500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89417553ac6edd8d9953b99bb3283986d898d8c964a39df9c268564f63f5cf19. 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/BXBG42400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5771eee7f47085468d26ca2914bf9fc89ea7a70bfa7866c06f82ecd025b1c855. 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/BXBG42400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccdd9a3c749d20358dbcabcd33d06d806726f42bd492d4f0ead4481f42bfdf1. 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/BXBG42400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd409afcc7521c207f9443c445df4d2d3a04d10afcc1442644dde417faed782b2. 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/US7VG2414661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf696aa7c8ce0a8ebb26acfd143cbcce6e46e08d416acf8a2ea8f1c562b2bd56e. 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/US7VG2414662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400972b5d554495ad16b9de21aaebb697a774504163c005d4d9fa176f8813604. 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/US7VG2414663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f57c2c10fe0dd2d28f3dca2c38cd2d6e2f547cd561dd4cc176f1a00c270750c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US7VG2414664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435696301bffb1142ed5f0d1a2dde12ac26bc6fbd04a5763210344770148bc1e. 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/US7VG2414665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582a535c3854ab0e352d22a10df46512849ea7a6c4dbc506919a7b401a27d0f6. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US7VG2414666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa94e2ff437f7e6a29224f6b872990dcd40d4a6a88f1515a5e599d6d640cc18. 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/BXBG42400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de69df417dc9bb15cbddf8d0f47f18ef6c0283ba2e1914376c943d012b56ec8. 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/USYBL1901392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632eaad4b0dc7f4cc10ade6fd86368ceb840c7ab3309765875bd9fade8522342. 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/USYBL1901393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1afab8be4009b4b8f3e032d3bb54e50814e682b023b0e3c89f9b4764572b9c. 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/USYBL1901394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0246e92f6a924ca75192d5b0178643c73fe219786c13f81ff5cec78e95b6c4. 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/USYBL1901395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9a71367096792723ab613fcd3fba14c29d3734c0b0ce66660d2c2ca9241551. 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/BXBG42400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99181b85c05e485206a758cff0443b4b50fd4a04fa85827cf0292d4e19f7769. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXA6P1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52af994ab8d19721899f277122807d94cfcf305b798c3191a4fbd2b4bdf5568b. 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/BXA6P1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee44ae6133dec179537a9607d8c31f7ad3c12bf18aed7afc470c7c574023090. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXA6P1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4705c6ae801b02aaed0f7653a0eab1e711b520569d1d20bcee2d0dac4fe2ed69. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BXA6P1700002.
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 0x79f702e3b6b21c49e95eca3a8a1e9606edb75bca8c48a7572c6012147df5c70b. 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/BXBG42400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeba94967ac56ad2de0de060060c049a723a364d56e0be3c39228eee64938839. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXBG42400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41df1cc57c7e9ae8b3ab3d2b547989ca3f3c06bb66d05eac0ead9bce86b636b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX1TU1900009.