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 0x76ac5e8527d40cd4d6561adfad1861e477d8f41d8852ac76bd04fa537ff41bd9. 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/69a3e03a-9e25-43dc-9cac-00929cc3fbf6.json and https://artists.proofprofile.net/proofs/artist/69a3e03a-9e25-43dc-9cac-00929cc3fbf6.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 0x9ee9c58de72e341d20eca5bea90f099c5dac0c641d83b39ed7fcd496c600d6de. 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/ESA092331850.
JUSIS AKA EL PUMA: la KBerna de TKMN, Vol 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c00675878724b5ffd08c66fe5f94f27b7f66c0cdd3b41b95470c54c064fe285. 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/ESA092319409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ced45cea6fb8253d4ff839a70f0e991a2d8eb09feb6031dd5e4429c7504b78. 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/QZNJV2491742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d55057fe6ce93ea3afeb169a864ef0290b90d2198b76a6c9ed472d4fa73a453. 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/QZFZ72442217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790482c090a11275c30eafadc5f727b46df11a8f959d2b3e11afa582f301bf10. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZWFR2300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28f6a20e899a85036833b4078c6d670526e9c624cc30b13dc0e1decb9df3a19. 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/ESA092332093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf7cdf9489813448790d36eef4b4c5bffae9e36e1167c4a91cc235d39cc97fa. 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/ESA092315708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa082c4113d48bd6ae658e2aa81ad0a735350e95609e5f3fcc1fa3bdfcdf5a939. 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/QZTAW2489709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab2dec0f194d1ecf6f61141195971df5903d807ffe7eccdc110e2c4383ea76c. 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/ESA092406002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409a199ed4923358c214cab25c6dca5b41cfebf12c955fced01ac68dd17721f6. 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/QZNJW2435591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48a6ee2f110a700d4f0c9c36fa19e9cdc37bab5ca4fe632d3ac788ab4d43e49. 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/QZNJW2435592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d3075fbc12c5455a848bc8f1c2da1dc496c1e499b47b4d891774d14a38ab34. 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/QZNJW2435593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eebebaecf6a6040d6cf6e5ebce444f9757e2abd8175b686468c87d2e1a6340d. 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/QZGLS2477746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b94bf3c316272cb716df0c9b2974dc045f4629b2d45da448eb30273f144ba3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZGLM2470246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3803b3e6ed8efb9c445cf4310253d6f600ba5d68c2b60b574d5195ff66865d3. 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/QZGLS2408743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a669467de90aa00f70f3b785ba44955e78cef9e15e508e884bdee2c56012a77. 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/QZGLM2479505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e31d9b37162c1a67c7193db1cd96788d6c184ca049368421a1e8615c36ee8b. 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/QZ5AB2422146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a20649f0abfda6484e00db578c61f39fdf6d7e1febb0e26c0975e9b343fa8eb. 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/QZFYZ2459384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66d672387175e51e60b354228f790f3df585b79fc96e26f2e75671060d615e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTBF2320339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd13965d5f68031c42d783911b72dfa908f24e379fd75d7be17ed0584b7445. 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/ESA092332842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb9d9c232e698ee9e83021873035108b7afb8f581472e9fc2418a923d6c1b9a. 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/ESA092321042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac101c55241afd35323abd6ffd9f46b61c524c17f48bbca93d61b8970d7049d. 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/ESA092316402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed1a0e7ea16efa07c850aa2d16282d9fb60dce9d8d60e61f1a606fb91be876f. 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/ESA092314855.
Rafa Carlavilla: La KBerna de TKMN, Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf540ab037f9d51ef690fdd93a284a7dfeef2a8f41cec9db94461218d24e3f89d. 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/ESA092313390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6ea671fea4f9d59a112ef8306a3f9c9ef197fbf75fafe7d435f52b3fb05419. 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/ESA092312587.