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 0x486afe830385dfd11fd0be0de90199eb29e4f8655b5c7311457b733bd1a5a250. 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/23f193cf-9441-4315-bca7-f7f0cb8172a6.json and https://artists.proofprofile.net/proofs/artist/23f193cf-9441-4315-bca7-f7f0cb8172a6.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 0x82e1e1976ef2640116f8d0b043f439e6a0694538b5e87621e2b877642e48ce2a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMDA71586145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6ff1a4279d0a3697b514b949848a6fae4f327ffee63324f4475f237679dadd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMDA71586146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9676b46c5ac7eb1d99fa1ebcc312fbf4e4d1ecf0d7bdb009b42dbb8a9c66c9cd. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QM6P41979195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fa03b245f2f7f8347484fc8ef3df7ecbfd61110fa755e80cdb2af31336c55c. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QM6P41979197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15e777f962f6c49d1d4f8c9b46321a33aac11c4be1a7324552fc64607428b47. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:19:57Z), 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/QM6P41979204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdbc645f9ee30ff3e6eb988f3306596722b0d6a22b92fe9a503c4bb36f0ba58. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM6P41979206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c364f4eefdb0c1327c452292a1bd4a20c310cb84fc7d9bcc658ba58a119bae. 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/QZNWQ2304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000cffa368605393f0a68f2ebe551a89960baefaa2c15fdc923bf2a2032b879c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNWQ2330241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411ee0b378ffd3a11c13cc060adbe985a4a4b104021e3efe76a41ab90eeab97e. 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/QZNWQ2330242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb816d02d6cdb43fe2f0c877985bfc4cb40b99210d1677a81639009e93b04322c. 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/QZNWQ2330244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200f274e8ca0c715da2acaf61b303b08d752419e374e8003966775c0a6851698. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:32:47Z), 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/QZNWQ2330245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c364f4eefdb0c1327c452292a1bd4a20c310cb84fc7d9bcc658ba58a119bae. 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/QZNWQ2304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1bd5a0a784b1667719bfc4d415d0c680c74e573420d72c46faffec0de32a2f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZK6G2303636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6748ff2957e936c0db7f7972909f0418b0e6dd1c4220d49c881ca740c553bb5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6H2324768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d29544b12ad5ce78ec6ea47134fd57aaaa755382804161daaa42f89f718577. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWQ2330243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2d4e23d383d0cfe26c8da3dfd9e1a64897bd9cef9dc34edc3d764637e7511. 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/QZNWQ2330246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a589a2c637aab76630a25d8c5954a0952f4104400eaaaac5632d9a3a5f5f07. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FRX452547658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf990951b9d5e1c58ad1d923781b951566731aa9cbffa817d8f3f39eeee5cbcfb. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DGA0R2454934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6970b52dbbd7d1e6e49a3457da5004486788b45c2a51eab58604521625ad6970. 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/QT3FA2586825.
La Danza de Los Muertos (Sinfónica en Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4deb66c0f394ede79ffb13465ae5d30c3edd195e2e765dbe81bd888ce9757f. 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/TCAFX2101421.