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 0xfe47ec51f565833a16c83710f4c23bf1f5dac7c85ed6c3f535fc97b9561a88d6. 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/bb8d8b69-5356-40b4-9520-6d9cc83d90db.json and https://artists.proofprofile.net/proofs/artist/bb8d8b69-5356-40b4-9520-6d9cc83d90db.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 0x459bab740ecc94e2ba208bba4d167026ed6d1f0a3c7646adc5069c5da5209acc. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:25:39Z), 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/QZK6Q1995757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c51c6706d9d2d8fc30fa2d82eebb213ab79a4e0a83bf652eb602e89fba3d6d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6Q1995758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892d35abde2f8bc89c3aa28e8faa5109510233ab3c4c27fdc6785128683f4e81. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6Q1995759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab45ea50072758873d960a5b236d44cc564d33b6034671d4ef3de2d6dbd6823f. 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/QZK6Q1995760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858da5cddf5f45def6b13f64cbdf7362f12928c65b356636f30ba145dc5f56a. 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/QZK6Q1995761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c836d92e484d047defdedf8ba784b17d3c04eea2a05475dafca9887258845b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:56Z), 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/QZK6Q1995763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b2369de8ab3884dac2199d6502bf32c3ced85d58848ecd5735022dfbe988a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:15:09Z), 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/QZK6Q1995764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614ccf34eab52c93854979c097c8d99d6e8d7adefed13df411b2d6064c8fdbb9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6Q2186409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a4e32a2e25eb45e045cf8c0d469e5f96ea5deb2e59498cfab161668c477b28. 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/QZK6Q2186411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c297ea304bd279051f0cfed456dde2df5c16a138d1b390e0109e09d7042e3f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:33:58Z), 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/QZK6Q2186413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396e7aa2211a772039cc75484053e68c2dea42970024e3b9f861e2afa47c8b69. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6Q2186414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e646f9f90b365aef45327c77bf32580bc1ec491ecd1fc03cce0d9db9af7a97. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6Q2186416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543bfc4593ea87a74f826d52575d779ffaa4f3a0ae9e3e73f7b06eb2c6c3b872. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6Q2186419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5fa76757761a932a27df7ef64734100e9a33fba2c3e41a51b840ce47f1f067. 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/QZNWR2281172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc326c0d406b2ab9713324f637fa054c9ffd18bc7355b9b943e3cc19a43b14b21. 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/QZTAS2204043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca5eeeb224b6b81266f31d83d7c3c66e34a785e229993c76e23be40be72c0f2. 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/QZTAS2204052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c667994b389bbb2f4f56659f1545d15a80c5a50f3a0933abeb25965a6b5d389. 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/QZTB22321218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b61ea8ced56ac5ea5b57427b70c1f0918e28b62d2224c9d17a2783e79a35c92. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB22321219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2d719b034a4f30744bbf6bc30d266b9cd637d9197a21408a92c16ff80d686b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB22321221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7281c2d7a732d6d729717aaae4a2dffcd4652c505e2277fe5985fdf35c32e3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:25Z), 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/QZTB22321222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f20caa547a0d8f79afb1c421b5be8cda9ffb55f8423742158ff47e994df09f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:20Z), 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/QZTB22321223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff236c5320f24bc9c7665863ba33f6bd8d2547fe2382a0a08b29367f8a37d3d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:34Z), 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/QZTB22321224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8724d54fe2fa90c20fde2923f2c07ad95bb303d0d876c60e8017ef5237bb5724. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB22321225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c3afd6f790fac0aa6fab824453dfbae377b1f124c94277599c1b5810a176d. 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/QZTB22321227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb16af550b608d96e4d1cc9ec7c1dd1975d804d6dca6eb30cc204f26917c8c04. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTB82515386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0e2b0bf3e252933ff45a717ab8e65dbf90df5570e6726894e96f80a7a512bc. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB92506265.
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