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 0xa6912487510ce0a38343d51f9571c29e5db3175b8d879c4ec4669876a66e0739. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e942e05-0f1e-44a1-bee6-29ea4a7d5ed5.json and https://artists.proofprofile.net/proofs/artist/8e942e05-0f1e-44a1-bee6-29ea4a7d5ed5.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 0xb0b5c20e9ba731afda31d84c5d325a7fa1b03a1c5daa7f520e03ec2d2cd2bb4d. 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/QMHUY1453624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337d342875606e831513cdf50a70fd71f204f514c1265accbfcdfdb17f68e6f1. 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/QMHUY1453627.
Concierto Norteño, Los Grandes Del Norte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7b080659c4893beffa00d2badf9730b6bb68cf03ee5c0bdc33e048291061e6. 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/ESA012251914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3409f087646a17598fe9bd189d646560014db461122fc4e3d595ed19a30b9e8. 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/ESA012251985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a4c8bd3b6221d2146f55eb2c425b6061a0c0d9bf40363242fe5930811b9608. 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/USRMK1024003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287c0a81a49d9f858688de8c454cacd0ecc3ce4e0b08f4fcea5f760ac363dcb2. 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/USJTQ0903250.
Arnulfo el Coyote Blanco (Serie Imperial)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9531392d5e7e8d75e0664dd3d8c032a92c044d6e19126b8a026357d4e71bbba. 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/QMHUY1451781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3e6d6dbb5ecd278c55eab250cabc1176668fc2c23bb449ef422477f483689f. 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/QMHUY1451773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517865447dfaed9f01bd707e155eb97b2722a6fd42805f852e09cc23417d52e6. 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/QMHUY1451777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7372f619b9195d26205c729c8bc362944d4092093524daa59a11c9f8e08ffb4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMHUY1451780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97552423fda851273ce4faded1e8bad59787c070497fff40b734a9d3e80b3aa1. 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/USDHM2407779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cbccd4418b3785f0deec2647b9af23b46be980ef58c4f1e0fc4740b343488a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USJTQ1108518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37d3a0304b2ec5ed28cf1dc9a7511351016dc24a54a442ba0ec17ad71982168. 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/MXF060300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ceed45b8e1311a8e809d27b6623c0d1cfc91de7eed7ef37b48e60014c24694. 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/MXD781803508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6ad91b730d6160296a567f2b995d83a30010a54e8b74ac8edc2cdd2b879554. 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/USJTQ0903261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4764e4e5c3496023d11cbe311422bc724d2fe8a8834e5531e3f5ec9b63cb6c2. 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/MXF066500007.