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 0x03722788228b772ff1b559fd1315389a285772e913bc660e6d67af57ce75b570. 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/dea4c72e-e94d-4ea6-91d4-8f3a7b0e6b0d.json and https://artists.proofprofile.net/proofs/artist/dea4c72e-e94d-4ea6-91d4-8f3a7b0e6b0d.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 0x6ff2b93cf0523e418e2b970165eb317579ab94781cf876d612636f9f8abced61. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/MX2620370029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f52c58a04f08290947298da5309bd1243f0db26cca7807c52db6b1588bd44f0. 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/MX2620370033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05582cd480261f0cebd897ccbfd075b39a96a120c57556bb084ddd3f14658e1d. 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/MX2620370034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2623703d99b6fc5c9ae414667275fcd353c6e026c14f5279e9e3207dd260d1b. 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/MX2620370036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20568e4fef61dd8a8c6200495e333bc094163910bcfcdcccb3bc56e13afc899c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/MX2620370040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea80033640b8b11f992b3858c56323b77454b88fa3bd8d2fb74b33aa80b662b. 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/MX2620370042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3f0df2adb2e215430fedfe9845bf42161c6c8c09270ed9ead0c811621a2cfd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/MX2620370043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067f75b7347aa359fd9e2ed552632d60056ef29bd44a5a9b3c3b79b43b451f67. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/MXF147700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf387b06461f21c6cdf93e5137f228c193fe567c727b294bcff3f6dc79d2294. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/MXF148000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c9036f324c50446236b503475511078e65bc348df89d540d1846961338f7a0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/MXF147700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21253c56023f492ce9ad58039dba531e51d6ab7a1ff3111a553318c17cd9f1ca. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/MXF147600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eff0058ea01b31a1ffe98a74dbaef86b9de1bfeaaacc47fe47b4eb4d760191d. 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/MXF147800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a1c7df601e74222eea0ac6f8afcf3e804bf2f92a0b174c51c563f3ee3fc718. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/MXF147700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ee8624db6b229350bf2b9920cd1bc58803ebdae1d3f7a178a79db58993b5bf. 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/QMFME1448562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22c37cd6aaae0dfea5f32b01e5b2f11cf0d5bfd4e77490fdbbf2392297930a0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QMFME1326915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d31233f5bc2207b011bdf68f61ce4a4015d68c77dc256e7cd3f6828a13275e4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QMFME1326917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39fc0ff06b641c0b37ff1642a117f2badd08bd765f5dc527ae9eacb924b8eb2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QMFME1326927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d23d36ae74f1a1e7b74df2ae20401654eee940ef4f585581572cd49bde4f9d7. 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/QMFME1326933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f52c58a04f08290947298da5309bd1243f0db26cca7807c52db6b1588bd44f0. 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/MX2620370033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a89f2479f1a97eaff7f3026565311086fbed9c86f89f0578fcc603a0688c081. 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/MXD941806179.
Tesoros de Colección - Los Maravillosos Duetos Que Siempre Recordaremos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ef23fad8e0d6ee948b888da69812f62143416d16609a06b6397dc87d1f3172. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/MXF147700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4e280728bf1d2a136a42cab31338514bb346c076b091cd58eacc5bd893446f. 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/MXF017800422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067f75b7347aa359fd9e2ed552632d60056ef29bd44a5a9b3c3b79b43b451f67. 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/MXF147700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c9036f324c50446236b503475511078e65bc348df89d540d1846961338f7a0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/MXF147700075.
Algo Más Que un Recuerdo - Tesoros de Colección
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4e280728bf1d2a136a42cab31338514bb346c076b091cd58eacc5bd893446f. 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/MXF017800422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f831c73ae50d4a8d23594ac726798c21d32cf24a0e150da9347a721e4d4ce5. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/MX2620070012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a25874164551563a802fb73acc2ddbbf7f19ba470a73ec2cf97db9c7a7662f6. 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/MX2620370012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c8d3da9c46a15e88be334eaea0e7ae20267d9da0001476b3a17b65cb00327a. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/MX2620370014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7366361ecbe0e27452415708d9fbddd987e23449e820a496fa3432b5d87e229e. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/MX2620370016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00d38ed84b363254a7b500a933ba06270dbac2d8ed2dce6dbfa80c00cc9cb29. 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/MX2620370018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a178337b700d0ba5e354e03f222e4a4aed059cfdff25b72b9a92b2a1829ea. 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/MX2620370020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b97f81d2eca11b328b06a92211e5f495406dc9d4741a0aeeb6f6956976e7f9. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/MX2620370022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcceb164e3daa60aa722fce440632732debab4991a373824e8900a6d1dd1fc71. 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/MX2620370024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9fbbaa9091303eb07026bdb7c53ddcea592f2352a8c59b210db393e3273ddd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/MX2620370026.