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 0x4bd22786d3bf09f6265ead760654cbe0f528c07b38eb92d5e761829113b5ac70. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e7a0715-389f-46f7-a924-13d852d4c991.json and https://artists.proofprofile.net/proofs/artist/1e7a0715-389f-46f7-a924-13d852d4c991.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 0xdea42d07681dba076299be1a95af9c679a8b2ee4d2f7f4826654df11ad7d44da. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN62447816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d13074adb8408dc35d1a5db6006a5fdedb42b11732403cc2340d48e30fd837. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHN62447817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b1af2f138c8c2b829c30f200a419e04ca80d6e0dd97a01813fbab3e015f9b6. 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/QZHN62447818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a29a6a84f8ad7bceb4152c35d33c8e3bb741a3ea50443cba9037f6b2fbcb692. 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/QZHN62447819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa867e9f4c63d74ae4b156924e887890482af7ea2fea59909b11a6c0900f25e41. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN62447820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef061fe9f2769bd3c446aa1e92681f1e934d06e943e33584fabb8d2db9280d67. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZHN62447821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef08c9ef31e286d2a35dfde504296f4a323c9c7bbf0a5e5cc52bf44b81e8165. 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/QZHN62447822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a1b810f2acb40b8b1ebda00af7ec7226450fcb59f741e7e01b78e04e04e80a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN62447823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0b1ca243f0fdb6c921e01d6780011ffe0ed3aa3f1f8483f7cdb816d9317d2a. 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/QZHN62447824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10429652eae5e1b6fadfbe477eee4543982c1ad97b83ecb599c3522790ce630f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMEQ2362695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059094f0f61a957e10f7eda70038a10470584c508c88ca5a41cfb898d900ddf8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZES92599201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de8f884c0be3e7d053cdbf826c94a48b80ffae344adf17575dc625b92202d9e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6Q2513837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059094f0f61a957e10f7eda70038a10470584c508c88ca5a41cfb898d900ddf8. 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/QZES92599201.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43688e55a8c76f728ab5be3f52fe1cfbe8b2fe76f935fd54a62b9526ad48e3ac. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFU2514544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de8f884c0be3e7d053cdbf826c94a48b80ffae344adf17575dc625b92202d9e. 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/QZK6Q2513837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce49b23b044b5a2f62cfb80c30746f7a23d5f0624b0bd8eadf153230d59d0c0a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLR2536753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca15277e502891e4f67e20b73f495b049d05c18d00a6b6a179c90342fecf5d3e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFU2514546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac93308b8ced30827775050debae6779f288c8d20c475e23ece988eaa10bc96. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFU2514547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059094f0f61a957e10f7eda70038a10470584c508c88ca5a41cfb898d900ddf8. 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/QZES92599201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafde670919e6dc983b3eff983b250e67e69f9e69ec4acd7fa453725ddb7b4a79. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFU2514549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de32baa1c07bbb5fcfc72bd1aeb1160d72d47f32f7a9f16e694ca51620620cb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFU2514550.