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 0x6624aab4880c164f04d2b0df98257db3569d1de49af757e7e2e298a8d8773616. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e734692-6239-4c3b-b0a6-13b0cddcd304.json and https://artists.proofprofile.net/proofs/artist/5e734692-6239-4c3b-b0a6-13b0cddcd304.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 0xa1297dabf61e17e079114b1012165ff6e39bbe7492399b0c4a8507e76a87091d. 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/TCADN1893599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058782be8f96435746a357386a9c0a3fc76bb3691444af29c3cb6fc957adc10f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:33Z), 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/TCADN1893605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8f06648f7b1f22d242aaa9eb5d1b0910fd74f788f5707ce769c368f0969ff6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR10S2240290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a98228bd59ff219dfc4058c43f4ef57e889a3c10cfae8b10c897d55cee6bfd6. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRX452282577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0213dbed254f7de560ebe16af8dac1c59d721b8ef837a1cb91f63f1b4596b7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GX8KD2589122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e639bffdf2b8a071c3a58641aca07bf336a7b4da60a010a079d3aec9650d047. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GX8KD2568545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23182c970615b3727cb7b1e5766dea93418b5c923cb436259b339a7aac0fc8ae. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GX8KD2541251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c9542ad098f97991a01c2e7fe528e77218630f02435e0baae2b3cc82bbb8a6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX202545849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ce5cc177e16d7d335fd0d4e97d1ac2e0e91ffc232728810b2c176cf6a3164. 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/QM24S1916940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe043d9c5ee8a905cab6692baf683ca07eb437a3ffd454182c40020bfdbf5bf1c. 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/DGA062031287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a3c9cfd3de93d473fab4eb42696dca89d2161a43408057eaf5551763d15371. 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/DGA072184034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952c16a9cb702fbd893326d7fbef2c315bc110b89b256a7acbedcaf6aeef5254. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA072184035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208e5eb9c7c3ed80e4362b4e011940b5e47ea8a290abd5838fad59abf4698c9e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA072184036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda58cad74dc2acc057821e027485602b3ef4870d7726995f454c864d97d9d201. 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/DGA072184038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95500cb31db3cbf8cee1b704515aa2d456c6fce57034c9d2ba27c088cf3dba0. 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/DGA072119053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd1945cba88a88d3c89aed80923c0c040406dc435ed5e53602f3e004e7ead08. 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/TCAEK1931410.