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 0xfb85a94903616d82ededfe26bfd3d07d586f1151b1e036d748c569ea8e3aa541. 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/74fb01d6-b481-41a8-b214-fe04bf4ba250.json and https://artists.proofprofile.net/proofs/artist/74fb01d6-b481-41a8-b214-fe04bf4ba250.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 0x31f6b87ce411ea7e8f2c51139e7fe3daf7da30550c80b1b884dab674b4ec8657. 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/DEBE71900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34993eecae4719fce3cff4f2fd2cc2f05556a2e0e02e48eae682aa7adcccaf4f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLHR21900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a795667704289952d53a0178d65420df51b559bc083209c5702ba80b9a60cac. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:56Z), 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/DEY472176676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c1be6f9afd327d0a8ad17baa4e46d48205d91dfcc148eb58e5f48b0bafac71. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DE1A32127909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbd2178ff96bff314d587a91126c41c0ea61d233b37eb229271086e24547701. 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/DEY472085085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be69f7e5abddb5817ffb08d33f3aef2478fd243f7b6c662ea9ca95b7c7ca391. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEY471880693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846ae7644a1b42bfa5f3844e1f9555206e9200136d286ccdfaa47280e9f6f163. 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/DEY472070046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917f67fd2278c34a10d7cbb3bcefba188873aea1453016803a9096dc1a938d22. 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/DEY472085065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd186c3a5b55a7514b83ffc34b9e47cc2530bed0388415bfe73f78f2c302fda16. 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/US83Z1817130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a80abc1833dd1e6d8790df354020df1a1dc33f875c831de1e1df1b01fb1866. 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/DEBE72000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800cea5d11d0ba5a67f4865c90037ea2ab999c637c33e90034ae16c1740e2f66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITFGO2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5791948865ed0001b472cfac3d90511d9354417c67e54e14c8b7afbea7437cf4. 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/DEXO12375063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edd532e2c7679695e39b8370e3f9fabd2443c2ff355d39c6d53a1c6d1ec1f25. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEXO12375064.
Global Underground: Afterhours 9 (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbdd581e2d1460dd2883bf3b21f360fab2a4fa440a79a06c4f4a9b46efb511a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBHFW2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b657d80971f4542b74b7b9b69ba17079956e22477b3db1b458466afd9f17b5. 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/DE1A32127912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe6e6d18a3ffd19727d1f517034bbede0c5dd576d2cee61448c902d4667d6f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLV62100957.
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 0x89dbc3d467cd87949ec573a9b6b67778b44a4dffa9b6b2c42b43f26278a351af. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/UKACT2032562.