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 0xc685dd8aa1267d172e91e2b98d99d34c936e43db69bb401b2e4a45d9b728749e. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3178e47-1c51-4f63-8606-2758b608bc61.json and https://artists.proofprofile.net/proofs/artist/b3178e47-1c51-4f63-8606-2758b608bc61.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 0x1f42d1534a28a12637b7959c4c12931add148e728fb96f28a621494a7bea609f. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHNC2598465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5deabd7353fded0fa889218feace6c9593faf81ab6ac20213ec82f60b08d2c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHNC2598466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a9c0dedf2ae7df6bd09382e60d63df317e0fb09fec4b3673156454f293bdcf. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:41:02Z), 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/QZHNC2598467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf171db719805510471fd6f02866f8e4fad4f4c9a33ef12e2677401a5587d83d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC2598468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2922a6f02bbeb594696a51f85c0c618ff51921e2cf329defe524c6502043a876. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHNC2598469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefd602e68a01624fc78b43ca2b656f4c17e9b0a382c1425acaac9c6617c33c1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHNC2598470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309db827efd86a39f2a6976abc1aaab3776ba6ad6d0838d660b09a29c4366dc9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNC2598471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4091bb26996ad1dde2832485fa7687da92cfc83041a00265a7cba2cf1d247c07. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHNC2598472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698dd5ecc43fb8df6d8540d0a1d6ca02e165a2e214952f1baa8a9790e0cb0fcf. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHNC2598475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b14be2c5b768df5dbf703e3b675026abed097926ee5401f6af52bff70d7049. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNC2598476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89067e7680ace1484ea566ffa31b7e55412dcd1db63c3fb05d86b17e6f4ea07a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHNC2598477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b33143ed92ca50d99e3b8629be750cb48fd96d6035f791ff5f0a3789a91da69. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNC2598479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a24de74bc80be019efd0e35056f3318e2ca1eba5bdc73f49af79e5283d132f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:24:22Z), 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/QZHNC2598480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9cb02fc0b21fa99c8f917fbdeaebdda20c651e38e600bd28181b2af0187f4c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNC2598481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf953c6b8ba73100f6c12cd9daf0bffff7eceea3086ec26cecc611c151e053af2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHNC2598483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ab561b5dd726606b89c4513e8044f5d3530f22427ccc2ffac0f572f9f8f835. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:57:11Z), 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/QZHNC2598484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33631a251fe0d737c09c823be7c38e0409285246ad8868ca63a7f0af0fd2a87f. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:38:46Z), 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/QZK6F2500811.