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 0xcca2ef96e35908c9bdd7d0ab214c630371f2925fb70f58775237380f8b09217c. 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/3462a18f-c0f4-4ef2-94cc-6f5bdcb883b8.json and https://artists.proofprofile.net/proofs/artist/3462a18f-c0f4-4ef2-94cc-6f5bdcb883b8.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 0xbd7f4e15de93ee5a687717fa597f4a03b083e5e156b7283f28a17bb154d6d046. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES18B1500352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd335ea4ab1352339a2a7e5b52e2195e17a184a9379b8a1f2c9c3aebdbcfc4e18. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/ES18B1500354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeba984bcfa5681fd860f6ade3b0452227193af0b8befeef284e468db1bd66d2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES18B1500356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ea0597ccca208deae5eef0d2531289aedb01d06eec0e7f9594bd9efd14b7d7. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ES18B1500360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd460265da2bfc1867be46c38d606e0f8fea63530bbff2747167c64260dafe24. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:06Z), 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/ES18B1500361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe780901e8161b623445972a0b8d7bce56600a2c7914e9de3b410c699ce941558. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ES18B1500362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff22ce5862df0c37aa926acdf5cb56d41bebde8bbe48a8af7af6749e1d4283b5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES18B1500363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3373ddc3c7a5a779ef94776c55560e719abe3c411b1fe51b6ef7a874bbe4f9. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/ES18B1500368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff723b41661801cbea9061274df274c05d3d6e1f15bf04399c9f603634ed8699. 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/ES18B2004128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90bcff7afbb3298a787cbf753b1601994959f9321f49f0e115b53e28a71621e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES18B2004131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e221520594dadf012252bff8078c3b47354e702366e7fc728ff30f1fba3e17. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/ES18B2004134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68a2cdfd36de35cff382ac319a789a2595736770340074e47cbe527b9d8576. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ES18B2004135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e05d1388b7087f27f286ad5e22ed5e834d7416ffd4f78e4751adfab3a945d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES18B2004136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e850d0858b352b814fa83c2f971cc916a9cf861473ef1d36ef97a76627ea850. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ES18B2004137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d0ba6f47851550732eca78f92ffc7474d99bb597e405971a1ae0cd91f48405. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES18B1702610.
Che pyhare mombyry - Juan Cancio Barreto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583995eefbbd13bbe24f2e6d9b4a1d9f612611cfabe5c3d6b2cbf3a839bd415. 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/ES18B1702614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd62a943c6c811b97e421b7b42bf72a05bcde055b611311c1f7de6c5321c662. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PYC842200717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e82ae1d170a62fee71fee749fd9b21db9543d3c5d941c577191b73350f8879e. 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/ES18B1600188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576dac57604f70a4ec2c750897852e4fb96410d6bcadeb91ce810b9f4f69a2ca. 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/ES18B1600202.