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 0x30a454aa054d1a23f7697291c56ab275cf45a6db014c15817a19740dde5c0a0e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ec0e09c-a29e-41b8-9af3-405f3154b304.json and https://artists.proofprofile.net/proofs/artist/8ec0e09c-a29e-41b8-9af3-405f3154b304.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 0xfc8525d28d854a342bdbdee2381723aa8f77ef51549ce18f3d0dd9f247e83d97. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZES61933701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c21cfd0f7c1f91989b0d00acfa6079fd6be161287c54280577bd2286327e0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES61933703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a741d4586b7039432dc703caaf8fbca62f83b63fd39f27f38c2a3d280a908e2. 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/QZES61933704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22acf5c683b5f8e794ed12377f840bfec8cda3f5a0791a180e78b6242634dbf2. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZES61933706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f95fe3b571bb51c535151fb103138ddcc79c66aa92c8bf7f0a869f65777d2a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN61919250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b7295d67469aa2b44b86be182aa846475a7482b6945f78b388e1f1a0ed787e. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZES61965898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1b3d5ee1fc60dd5ee3fb289ece966e4501c228cfbac423283e81dc2a001f0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES61965900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885955f9532e12eccef27c90a0304a0575403bfff634507f511e34ddd0caa3b0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:43:45Z), 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/QZES61965903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319c74f35a5d9fc34cdbf6996bc14acbe2b1b6c2a1f6e1a7ccd13111ce5a4e5c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYW2073493.
Perdí el Norte Pero No los Polos [Gran Reserva #1]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8430997ade613968cc2db49310a66f31b3248fb1dbd466355aec4acca71ddb3d. 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/QM42K1932936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e21aa32d03e47f7ecfbe52e1b56ed1b6e8b11983da17effd5ec97bf9c92420. 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/QZHZ62133255.
El Frío Vuelve a la Ciudad y a Mi Corazón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2970550d72e632284f1d05e589bcf9e75e441a998f7a84babb6b70b07db4af. 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/QZN882158407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bc80f204af08e039acc44c761bf4ea609911568fb65f4bf2b85cede3bc753c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN32489163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fa67f3c1f0fc58fa24519b84612ca5d5d2410997c6d5c5febc03f134ea8fb6. 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/ESA011635448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c19f0d314d62802689e32373ad2fa3efbad8fd0fd29ff7730af08511e064e38. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZW9M2259699.
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 0xa7f162f04a8deb9c7ece70b0c43cf57e5d91c21563620c5180e06b43013ab5c7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE5752236448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd75bcab45868e81321f158efb3addbe4c1101e0f6bcfabc66fa51a66fbc06b3. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USCGH1738274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d19c0c641ca08168df6e9a1465be32c280403ab67a51661ed4dd0aa8b071c2a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES71G1767041.