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 0x92f3e694f11efdc122cf9a65de8012a3ee1c4eb1220aed2a94dcc26906cde8f0. 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/e2e605b1-e04d-49ff-9c1e-2caf21d39cf5.json and https://artists.proofprofile.net/proofs/artist/e2e605b1-e04d-49ff-9c1e-2caf21d39cf5.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 0x1f5790b6c9781ce0b0c45b9530107e7a0240cc14e38349c0e3326c52c7c2cd84. 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/QZFZ22196929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc49ca91838272067f2f6c7e40a4ffed4ef9a0c0df7a0a7bc93da7538bd2a8fb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:53Z), 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/QZFZ22196930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fbc290cbc0cc19aac68a4c3c0c76854eac5850626e440309c2f416c08c5811. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWW2165745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214c731595daa8040fb7dc2ed66d8f829789362797ac31bc4f6fd3d71d026a40. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:40:02Z), 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/QZNWW2165746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb6226b0243d2bca9804d51c6566cd88c93e5a84b937eae757c614eb24ee55. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:22:44Z), 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/QZNWW2165747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d1b055b726d25130c92540e370844228668fc8242d310b532896d9b29db9fc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWW2165749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d500035cc2519af7f14c4badcd0c15bea820aeca1216f293600c1fce2659f3f. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZNWW2165750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ce08362b9f2ea1410222083324aeaf520263d45d57b41a5700e94076e4ead6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:49:00Z), 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/QZNWW2165755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f77c5c8215e7a436b1aa4a5fe00e777e74334399b8a0ca28ace1f31ec10e34e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:37:03Z), 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/QZNWW2165757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbfa6d9df08f812fd8f52d515b1563f9f04dd94b19d8d87a3e526429fdff5a7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:10:10Z), 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/QZTAS2245483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52806f1f9ad16dc104470d670144120671f8e40e6815cbdacf0ffc617ea23b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:45Z), 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/QZTAS2245486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8a43614d425ee3a4ae2db9c50750b221b1cd4a0e0e88d5c0e6d1f3b8b626d5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAS2245490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6447c3e1d3380a2f9825c6e34f5206b15aac74b62c820fcead7744f0750ebb27. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAS2245493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc7cac1198e638b9fdeec31df7e6e25678184bd8f33c6ac76d6e3ef4c2417f4. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:00:41Z), 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/QZTAS2245494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58b682b8c93d5ab4d05f11cccd075d5781f95dfb378ddf8e6807e327ab43fb. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:13:55Z), 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/QZES72340595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a8f059c9aae12aed992b7a0ff3d6cbd4c93c850e0473db2a80af069ea52ab. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB22323886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789a9b7ca9a04252faef87e293c6882ea604ec5bd2e23dedd919f6f67e89a2fe. 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/QZTB22323887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e62b4da9c4c4f85aef7fc3bc75cbb3ba1a20c8014632f1da3c5df48b5e5fb7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTB22323888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a43f039817c8908ea8a68f2e5fc2a8ae90ab4ac069fbdf49bc9185c1d411c87. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTB22323890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b530341b8bb5ff8b496f7aa361340955cef453137507fc5eed5a6ecc9da8b7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB22323892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2da1e863f75987b8b298d3c6c35a1b3e337621e89e815ec2c6daa8fc1eafbf7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB22323895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f211c3728c77e47750c88e3d1d9f23a6460e5ab842a24e0e9c541649f7afcd. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFR2410366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17fca79d27ae004ed9a582009633d1f68b1475688be0ec9f66ea15566414b05. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:34:40Z), 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/QZWFR2410367.