thumb|Machete/saw combo thumb|Mexican artisan Agustín Cruz Tinoco using a machete to carve wood thumb|Mexican machete, from Guerrero, 1970. bull horn handle, hand forged blade (hammer marks visible) t
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 0x2e66067f3a0a37ed00a911112bb827b6c60007cc7894e3f1a99212532aa58729. 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/b3929a4b-d1d8-45cb-89c1-ab965ac25178.json and https://artists.proofprofile.net/proofs/artist/b3929a4b-d1d8-45cb-89c1-ab965ac25178.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 0x472cbc0c5fb2a1031f20007357ebb11a1663a9ed84ff789fde187e3e07ffa996. 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/RUB661200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5853767d9311fcc74438daa0757bba7139217f099a25ebc7d2c5c5f5e1f2d6e3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:07:04Z), 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/RUB661200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe399c8914f0820abbbd82c163b25e2bcb519b405ee74da555ea299f1ba56d1a1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/RUB661200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeaa4044e263de92e9ceb888c49f3f6f9993724731e3136f91492d224d7ab78. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FRX762163840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1440653962fc3ef58544e30d095816df460721ea3ba1e117be4359df5abb5. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:52:03Z), 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/FRX762161045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08196ac2d59d28cb5c0c4ab2ebdaa133fdba8fe82dfdd31088cadac6989bb566. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UAME11830110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaedeb86b6393bf3c2c8c974747186e38ccb2e1d928fcff8dad1a6fc0fd7a9a7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR96X1980556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc37308f7506f8dd84ec05be103e9daddd09d6d1763ebd5de59dd9c7d866b2a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FR96X1988111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdc53cc5bd07b3d8c0f4e7b78944261838e12b8188006a1f4c671902ffdc3ba. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR96X1988113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4931a05cbbe1c7380e0d68ebefbc9f34960955c8b1efb64f58037638335880df. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FR96X1988114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421dfb8f99b0e2e7eab5c6f2fcf25b589bb37b4e56979604ad9362a668278a15. 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/FR96X1988118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088744f3c2b555796e6bad15e812f1b461f60e19fcae3a753781ba1518941506. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:49:56Z), 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/FRX762086438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a2d41baa59bb80566372ab0491ca1bb32287f3aa6a865019a4ed196652d12f. 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/FRX762086447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceae067b29e13a560c7c93d1fb1674cda3c9b9141796042de519acb153d20365. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX872075123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42e5cfeb4e7aecbcf0cfcb1b0dc5863da7df9e436f0120642a9b35774e64b43. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA072118939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7ec766adf8af6fd0a78bfef3b35ea36d512bea49bc8fbdd19154007b3cd4bc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA072118943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda0bd99c485f2171ad0776849440c25a61e8090a6e47b3a88a111b1cca20b88. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FRX872196128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe627b8fb48303dea5294643504d8fc1db18a84ba4ab70a12fdba8e1c06609837. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR10S2373124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac203e83a1d29ea2df739c17a1d2ac1cb8df1c9badf4fbf8c969bdf5c0df3c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR10S2373125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50b3a116500e5d1b15b0138c8ac0e5460d3d2efa6feac9cb5fb976c44d7846. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FR10S2373129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeca2a4d2719505ce499b5fe10080ad74113ecf8183b0867dd0929ffb8baabb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR10S2373131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e8492cb7d712ff2705b4520633d1041f8d11e940c785b14ca5a5291567ac83. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DGA0P2431460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8fdc5aa1bf43b3babe4aee2583af9a11f1ffa9281efc110736fd10d1137d60. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DGA0P2431461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b19e20b5b68811b28215cf573fbb8684fae22e2842b7fd4067a4a019e59c7c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:30Z), 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/DGA0P2431464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb280fd8a9e5ef3408f9e34cf0f4f992928d9494100eb3836b67740f91d5ce3b7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DGA0P2431466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a9daeeb6f7ae612c5845bb396d4d8d306a9a66511ea07ef3d86f6362842c69. 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/DGA0P2431467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2aff872844e975e2ebecf76a5fd12214327e82f52fd54cbf4c8df890914e1. 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/DGA0P2431468.