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 0x797728c816c945ba6ea44c16ccba3b1653073d336166fb14371f5bcb89f9bf71. 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/091f34f1-ff93-494a-9ff1-a272ae039778.json and https://artists.proofprofile.net/proofs/artist/091f34f1-ff93-494a-9ff1-a272ae039778.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 0xfc1ac6a345b58cef661c7e9865a38fcdaf66c4740de6a0c58fbaee7a45d2cb06. 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/DEQ121643196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03203b064df770f382947f9f23fe79f1fad73a336c38a913c9b88a68f6fb7513. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:52:44Z), 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/DEQ121643198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99cec176a2b2abd5ef46651ca8df75ba6d4d5686ea94832eee71653e5e62b0f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DEQ121754111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2311d150bf50dcb6f5b98f4174a405f38c4817dbb5ee9118fd44b059863d34a1. 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/DEQ121754114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a58e6178904d157e2ff9efcf34691b5a19522f204f501effcab4719d54f5d73. 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/DEQ121754118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a86120ace2dff252e66b42fb8ede58c699d45efa7d55ecb867a2cff0695bc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:50:51Z), 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/DEQ121754133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c8a630b57c992cb8de19ef6c8cb45cbd8f1168dc4165c7816e05920b271f26. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEQ021803091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5305e7f1e4ed352f9b1f6461bcd2886d2c833acefb52566d87d6351364ed2100. 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/DEQ022113359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53479392c90c7d44c066da01dd8228fe2b5c0407cf69fe5a54b79a5159650904. 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/DEQ022113371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2661bdae015e363b780816e160964900fb4077512e04bb7633cb72f8d4de40. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/DEQ022290177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57e879e4b0e8ea9ab23cd305823fba91e13a6c11025a26cb2ea74479432d83c. 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/USANG2498681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fbd531d67734699c169395816e77c749d7517c45e83729a45a2add6bd7627f. 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/USANG2498683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf46b83dd3d6b46bd7aa2b8872e26f06c373b30abfe41c3b3ccd9b2ecd72563c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USANG2498684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74008b565a3770bcc997d0570f4d9b3d72ae8e11ae22dc4c4dc6447b9bcc96f0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USANG2498689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0477b333b4d3bf59d49572dc6f2fd95d0c5fd4027c3ba6bef35b4b5ecb8c0f53. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEQ021904698.