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 0x979e0166b2699097b0d69ef2e92975c977bfb1b99fa0b40e86574ebe56de98db. 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/7e54d7f3-ab6a-4de2-b484-3af9a8104dc9.json and https://artists.proofprofile.net/proofs/artist/7e54d7f3-ab6a-4de2-b484-3af9a8104dc9.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 0x3789d7e3851420e180b43e5aba96e86085764b1e6de409930cd03155dd6ef42a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ARU859800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d6933326977293925a64e91d36996522219839d62f7290b447b9d87e6808c1. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ARU850000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a8e8abce54ef1e61b95734210d4f734b4407302ab310b768210f6df75bc71a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ARU850000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2d2416ac80196fd13a494cf7b8e58d0a37ec08643ca2af5b27c10696d19a0a. 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/ARU850900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c885bb02eb6c843b9e2f03b1f16883978e3b81709f79fde55d441a5f217ce01. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:20:43Z), 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/ARU851000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b6982cb821b66b97fb1572df2ec572a73eadc000d7d3ec6a76b6346ec21c60. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARU851000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61d2ffe1f1323d26437e50cd552de92c763f5cf5cc3c5aaf4af167421b27b9a. 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/ARU851000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c91c428ab3e60940c109cb1fd27924e28a7e8535d0cf6fd2513ee21d32d38e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARU851000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9f0dee265cb59697e16464650a8ec142a6dbdab89927f10e958071a7bb0d1f. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/ARU851100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fedb4d34b09612cf376c175410b443fff9b1486a6dc1cdb7c60b26c84bbf1b2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARU851100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a1491f81bd156f4c8fb9918c9b03ab3de973a51c599944a920836a8a2e42d7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARU851100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9ed636081fb1a053cf513fe2c69b16e03c680445bd4e6944229766948ca9d6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:45:11Z), 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/ARU851400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d06efc59be98566fe010d71e6b72c42f71ac1212162d9ce2ce28997da19a93f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ARU851500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a0550689651397e55e33ca915bb7f5dd3edcfbf1be0b0abbd47d2359d6fdee. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARU851500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0311a64b69264dded0c3bb6385d47a104491a6c433140c3e6e0c1d39f370b2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARU851500005.