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 0x0737f1d0268f2c4fe3e44be3af89fcca15c035ce7a238cb34489a3bdec123e41. 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/f8e171e0-e3a4-4253-8d2c-2c25792de581.json and https://artists.proofprofile.net/proofs/artist/f8e171e0-e3a4-4253-8d2c-2c25792de581.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 0xaed2af7e23718b4d78a33dea43f1cbbb883c790eb39404522dc1b4d1ee3524f6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USL4R2233992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9643bb14e60895453a0ba3cc7d69d37388bc681ae141d7478d8b1dbccede36. 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/USL4R2233994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005903c12cc9a7335fa818a679e05478bdde95f79792520d0f8bc3227516d2eb. 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/USL4R2233997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87c0304c6ac85fe5ebb2220fa02ef4710ea1f870f02fe476854fd48e9a2a8fd. 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/USMH92346299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6cad7f4cef95972a6f55300af99d6c0b15cdb88a25024b696c9797df34eb1c. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USMH92346301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec246654f3001c4324de9c792f343c587d88466f432cb7d57771a9526880d265. 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/USMH92346302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a93ddc6f0b875e7a8d100e39c8a5943dc26be5dfef3a22bbdcb12118145dee. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USMH92346306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af28990eb9a005c6f38975029424bb1af984dea60aa8ce44bfa1fdcbf5a7b9b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USMH92346307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5c1d61da1f057072d4d3c1bfa2b12957a9460466f682e268cf6d5a08e0e26b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USMH92346308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a184e5ba5dcb3a1b06edaa778eba49923e5d4c7850a6a89aad61121d9ba357. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEYOK1737534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9223c24ac8dc46864710aad62b7916d8f454613b7b08dc9445bcea182014bdd1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/SEYOK1737536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9a7044976b1fa50a2902ad2918e4b95d124154d4bcdf5e3c79271bb6831fe4. 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/SEYOK1737539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ea37d832184dd1639b0e01ae6baadb4db2dc0ccffc8155612fd7cbb07a3c8. 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/SEYOK1737540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cde9f58c3db441017ea3451c4741626f280e011841787a5d42197e29f78fa8. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/SEYOK1737541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85097ea8b25c3d51ad29a9d815a4b5bd62f560edc60ce549ce4aaa5178b2fe83. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4R2220653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2834313a4123ce6c00541ae446f0f9bdab46ebdf053f59f22f1794cefd68f57a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/USL4R2220654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d83110931993dfa3c5a3793062465d94a252a1bf039e5a53ccc226288f4584. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USL4R2220659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417ef7fe6556f02f54166ab09e673f167106b8e76237388120e937f0ab10e3ab. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZXWQ2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeace15fe43742b0eb482f58e8858c0b061a5726791993b41e5d77b7b60e1eaeb. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZXWQ2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0101b2ae36ba3cdc9abe44a0b67bb943a542a56ae7924a8045c19c3cdb614. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZXWQ2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12a4d4fb2f2733a9fd97ca132e4fcdbe9e715b2573d51575a4948e846730416. 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/QZXWQ2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cc8f43d661386c26b4fe9a0e86fa99ac65533a84078d89f954741b32768d95. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZXWQ2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6a9d2b17982a304640af548f6bf096356c958fe7067da8f4ce92a7cf6b9722. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZXWQ2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a28b79f7efddcae82bb7ce2f918736205032a1b82b088448d718303b914f27. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZXWQ2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8268735a24ba2aec640ea9f27d47e6f6deaeeaca3375de313731256488e8a21c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZXWQ2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c83233ccf044b716a2ab6999da6e9518d53001dcb07a0a7705d2caed2851e0. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZXWQ2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cea826b89329feda3d4b6f1fb47c8dff64aff891832c17ea592e561f5378a74. 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/QZXWQ2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df21d9f4d046036d87debbe0c4782ac4a910d353c635d407601dc12cc9618a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZXWQ2400084.