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 0x8d517834c6300d91e1471422b5d66be904340774963eaaa0e32854d9b8d747f1. 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/c9bae69e-df29-4420-9a4d-98a45a635a7c.json and https://artists.proofprofile.net/proofs/artist/c9bae69e-df29-4420-9a4d-98a45a635a7c.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 0xd0f25c75aa57b3ef736260839b66677d6c76e7a2e3af7b738319800e47617d3f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USX9P0792246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a126d723351a3ce242fd4ca8ed4bfe689125116694c35a2b3670e7cffd81350. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/USX9P0792247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8abb1000c7a80a1c088dce6c6a9c1da089434e136515c94d056ded88c144054. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USX9P0792248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0460d8f47d68a4fb8b2a6700c828bf71faf399404505ca76f6d2fb8528ba3d53. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USX9P0792250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253db118af99a555bfb8fc04d304628907164885fbab9ee9941f2a99fed177aa. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USX9P0792251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9f6fe1a9791c57e9a3b13b7a535102eaa39eb7c461163d0360cb0664c3bf6f. 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/USX9P0792252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736af3e47d4464016b538b85da558e68cc46c22c5ae5e89c543e83c93f3a5dc1. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USX9P0792254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68fda442f7566b1e1bf777a10508e1fc0362ca6dd761cbeac9b0d9b850cdf17. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USX9P0792255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ade7a7b82f60d96f065c80997f5e60609410c00f599d0272da38517b17180b. 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/TCAJS2540771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5482bb319f766f3076e897b2a0abfbf8e58b4c1039c48394a888a731f8acba03. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAJS2540799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de5b0d8beabcc95fe7e725b8f4be12824536c7976a025f4b1a55e27a4d0010f. 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/TCAJT2540907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3fc7527118cc8a9f5cd88894590726a9f8e9e1a400cd24eecffa445fba7e87. 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/TCAJS2540968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77784dafa98c1fe825f3e2b18fce3f1776ed8ae2383910adcfb0f4bd7feaf2f9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAJS2541049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3105d990a34177a14b686ae3744f9027f7d02c04fc920c771760b47369a616b2. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCAIL2404780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8e10eb8b7d4467bda0524b2eb18cb4f4e954c41ccfd4f8c50c3c09b2066c6b. 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/TCAIL2404785.
The Ethiopian Millennium Collection - Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f6d44ae032077def90e55133b163db54f0a121923dcdb06cda6dae09b2343a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USX9P0727710.