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 0x034ba4350d2e598bb4fc4d42bfe62ba15b39bf10de12351a3757f96b74fe59fd. 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/de843031-2dc6-434f-9e4a-dbcd4cd5385a.json and https://artists.proofprofile.net/proofs/artist/de843031-2dc6-434f-9e4a-dbcd4cd5385a.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 0x413b3f3becdb668871b5bcf2483a876de7e108e3024092b40d8e3d628e8a1379. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMPKX1870357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908cfbea308e286bed3807e8bf0ff821ed4d346495cd2f85d21a4bda43aab9d2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:25:28Z), 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/QMPKX1870369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ce8914a6eefd2335db31cbddb54d9633c5f9c721eb8f82b832ca8ecc5868c. 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/UST8K1888163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e0727a7fe72b666655cbff12f31bcc6f39170e58a5206386bbe026a1f31bb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:03Z), 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/UST8K1888165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ca64d51a87ab4c339e92f62f5722639a0fff675caeb76b12422d9d34b4b38b. 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/UST8K1888167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047a36094b7d99be7cb0cd3fe69d2b6f4cd96a111e221952e01d45044e2484ec. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UST8K1888168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19964958da79a682a3486ef3f1dba44c268697789e9855c1c45c1ab4afab328. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/UST8K1888171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a9374d44bd4b2c37689c50d12220b28e61b51daf720e5cb18ef17e6373a304. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:08:18Z), 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/QZES81873289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9878d8b24222e7a97cc7016c74689c715d36c3a2058573897a566cd5ffdc75ff. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:27:01Z), 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/QZES81873292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005a4fe5a90dddcf0adab92301144d1079c3575567cecc2929d49cafa9a734e5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:07Z), 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/QZES81873298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a39d764d837e85841548ac83d96eaf0ad6a922aec2d815e0efcc4b1a9764e8. 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/QZES81873299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a55c01d5a4f8af5f5cab6837b098e099ce77915bf41af1ece5db7cf83127ac. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:09:52Z), 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/QZFZ42091333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff6da7c5ae5365474089e9b2c7bb4929be1a4c1ff1b4f8acff372f5e7c3f366. 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/QZFZ42091341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228a8d748a4795c36264546788ca0ba229e04c7bcbb712aa6627bd70b40f724. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:56Z), 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/QZFZ42091343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c9b10f32dd9da18828a30ca545aaf5541d0b8b7ef28231a9287830a6cd49bb. 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/QZHN32239478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a034b50a883eadab0439e61fbb284858f716e9bac7153b2eaceea247a632b21. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:21Z), 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/QZHN32239480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fe69074f63936c4475defb1f3e51b28bfe475bb8793399b02667c74eb92634. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHN32239485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5cc4dce494912bcc264b8ce1b932242be0b6a52c9da69ae82107e3443ef24f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN32239486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72303c8054bb7e866484fe253ae19b028eab50b9faee09be6c6b0b0e3a5f145e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN32239493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd67c51d79d90c03b6ce93bd37c4f52d59062d059200f3d09b041a1c540e11. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZWFH2395165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157bedfe4b3439f05e22e9139c969f0969fe036bedc0a1d813f29f99c2f5e466. 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/QZDA82462397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d759df44b2083d79fdb72caea6370c640dbf7033c87b8611abad89b795d7cc. 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/QZTAY2431322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f71e6987870ad2dbbe0983eee3e5772cfb82e7a000617b82989644e6e6d341. 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/QZZ7X2566178.