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 0x148346c723c349d184d5297001ed21a18dea3928f4f410498b28322ec380eefc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f30bfaa3-451c-4fec-9a2e-4d64ce8e5f27.json and https://artists.proofprofile.net/proofs/artist/f30bfaa3-451c-4fec-9a2e-4d64ce8e5f27.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 0x32932bb47a813c70ca48d2a0ed00a0bd33e3d5684cf6b897714359b990805792. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CAGOO1938677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a2fe878be145c0f76db5dc3444dc241a54be7ed071f3dc6ddd8f8af7782904. 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/CAGOO1938680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a5470c219a3e0bf89039ad6b0ea0816ef7ec22371dcb18e00f3eacb6040296. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:45Z), 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/CAGOO1938681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d00af4c807db48ebb0f1f8ac13eeb02ab7ac517187971df13bccc8a620a73a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAGOO1938689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e82fbe2648cde09fc9b21e88a51460b038bd201149410fe3edc4e18d024f860. 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/QM6N22082032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd071e71f8c55297918984902c290eb6236fbfa75141247aca301b2bdece50. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6N22082069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1760dbf392885e266cf9121315c356e448b3105c5b5d9f9365cfab1af68843bc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:54:43Z), 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/QM6N22082149.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205dc2ab9c2e93a6e40f9a9214df6d9fd33939dc43e9e0eaf1da672323cb4d9d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:05:35Z), 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/QMDA62150124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479e0f2ea2e15ef8a71012b5952457adbcf382722c5214170fd08d15121ef42b. 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/QMDA62428086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67dfac4dd041b928e45ce10065d15e9adea75d8f73d818ca40f80d011ba9e7d. 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/QMDA62427923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6988cec20270c62254c596504517ee6e206460d211f233f86e300a002e325c33. 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/QMDA62427925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cad29f83bda17a21f89b7a48515496a468820cf55eb94a89b1af9ac9e90f99. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:31Z), 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/QMDA62427956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bda8e9b96d1f0a55ff457932c5b56c15201064e4184cb5821b342ef2e4294d. 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/QMDA62427966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac7ea4484ee8f5eae00e465f05b5924c0f890f7b5b466c52a6c65d73f3f5d0c. 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/QMDA62427984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627e43fdbc97d344c9fb2fda1d0e0b697395284f6fe8d1f3899309deff816d08. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMDA62427989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bea9286497c0de32a1c788469799f3004cf9ac47c72ac8a97f171e7fa6d219e. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:08Z), 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/QMDA62501812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006edc3ce493b9384392730c6381bd80dca990c11a39bdae27f98a2af3d3bda1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2375714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb02069fb5b998b4c511bf5098b171040cbfd819705dde229eeb4278dd1fcb4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TW2375719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0709c645279fcfd4d36c2d768eca9cf81b3d2b12e5e59c1cd345c7071ba08. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAHX2417096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ce9100218c0ec186ff26e62a796ab5d07a3188bbb379ac48423b90b4bd69f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFW2128714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0eb36edd8896800871bc5fd37d7b5ea6281f96466957b97e120de75d5830e59. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TW2375720.
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