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 0xa74aeca71c81d582ce0e7e8894c61d0f1c3b46df5782d554d7083107d2c14d06. 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/1efc11e6-866e-478a-b319-b784abaf94fa.json and https://artists.proofprofile.net/proofs/artist/1efc11e6-866e-478a-b319-b784abaf94fa.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 0xeac06e40da3da672f68f3b3c335c4d58b21f609e8f48c126080b2d2374aac966. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR6V82530303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216f90b4815b8c8be3b5d689dc36bb685545751e629b0744e471acf2df237e94. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR6V82530304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68233cd8179696e26df9a4584a9dc9081a2213e1bd9f02e452cd2f2f17572c9d. 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/FR6V82530307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f1bf26326a01bec8337d18269daac12e899dc5a690732cebe9740170bb0502. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR6V82530312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef594e86ecd2c54961dde89f97061e8e10c20f32a479cdae4a3dd0c5b1b0a298. 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/FR6V82674867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528f5ea941459d99a6e33e6e07aa7409eb6b51496c94427b3a975409ee8da8c4. 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/FR6V82674869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5636d85ceca714277a38a4099aff6e411df9a6bdf0e0a9303cbf13f1897423a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR6V82674870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929915746bd605dee5be29d27a71895d51682a8edd3dd1d4b675edf83cf8752d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR6V82674873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d79dbe30b760e6cd54f4673bfcd390f15a46e80e5e330493001bbc47d59a3e5. 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/FR6V82674874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92523d91ec726c23b2aaf807f20fe04b912e48ac5edbbeeea5ead3c579938288. 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/FR6V82674875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b7655fa83f7334f113015384a633365d2b0ce052f7a8200c35eb979449230d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR10S1455881.
D.F Efectivos del Rock, Vol. 1 (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40ea2132b6bd224d24b67392a19d4a04e0bbcb3f2ed8e5c8e6cbcf31fa75773. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR10S1455917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b06076067b8ee2228374020bac6ccf7fe8b78465744cf45b1e8c7becc4084a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:32:45Z), 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/FR10S1455920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d60ac196852ffd83d5a1664bf2071cc3a37492452045eecb5b295ce50376b31. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR10S1455921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc629380b70abe2cc635517dbe1e6811b258906e6f924f7ca960bc6d27aa06a4d. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FR10S1455922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64328b4f92d8979a0c5f679b3a235366f01533f4c96330063586d7f9fd50b834. 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/FRX871542009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabfd2d9cf9b09a1c439906ee5124b476f5e8556b7bb5d3443e763cfbf1510b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX871542010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d944d515f6709e762ad1eaad7f6b2546417ffd7b597daa9c4d917b5a58a211d. 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/FRX871542015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98476e68a5146f1445037eb0eaf89fec0f8e3062b947f78434f6897b7768869. 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/FR2X41442695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50bec231b1dd91979a1a053618d10013fa3022283be647b32857d46e3aacde1. 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/FRX871510756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38313e94b935f986f2e06c5ccd1c46111d3799aec3196638776bada68091effe. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR2X41442663.
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 0x50ca6eb9d95ebd5b0d1eaf5b09f08a94161a0a43eeb220411f86b2e995ce2f9b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR10S1457715.