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 0xae9a67d8770647047c81451e7d2b0818c243cd1ebc1f971b4daf9c58a4e788af. 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/52da0524-4488-4ec1-a847-289b34bdb416.json and https://artists.proofprofile.net/proofs/artist/52da0524-4488-4ec1-a847-289b34bdb416.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 0x44e54d8c51e50885048bc645b6aade483e2e752bafd192a4edb4dfbe8a0dbfc3. 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/USA2P2204843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f138dd8f4b10c434e9c581ada3ffb647f3d63b7deb2147ddc03b8d5cae2e323. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX202289194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75ddb4d974d35515654839bd8faad2b8784c9516ab02c04e68ec761a389943b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:13Z), 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/DGA0P2351461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd068285e098e4013c122c2aa73381c2c2624d76e64ad84bdf845fcb08913aa1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR2X42405079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d0ae4e71caaf8a0d59c1a4be0169cc98ece285a538b2e168649cb17651ed61. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S2475344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c59be2794e703c2919b338cb54f7bb83c8db490b8903eaf1d7c7c4573a27812. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R2403995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1498d19f24c7dfebef05051bdb27c1c3b875a99708a91efff7bbe7f6de21393. 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/FR59R2403996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaf69833383c96da28c8a3338ba8b34245f67be7bd9d885fdf4f977f70b9342. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42404988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6281f44e1b0109e970ce135b58b7ac5a9cdfad3ad4d91a3d5f16d6ce75608343. 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/FR10S2470619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d0ae4e71caaf8a0d59c1a4be0169cc98ece285a538b2e168649cb17651ed61. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR10S2475344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd068285e098e4013c122c2aa73381c2c2624d76e64ad84bdf845fcb08913aa1. 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/FR2X42405079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e491ffef42084008eaaef5afdc0d6d362fc3bd43bb0301b2597bb99ca39edd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2404000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb37d463f0b749e92565fd2a94813e537e409ed91a1ffa4e742affeb24a19de. 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/FR59R2404001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d475c0c06a37bc3bb2df88665b153af9bc2938688db0e947455d48278cf2a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R2404002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9286ce165611e9c000ff6ff826a6af935bf8aec26a1be77877e520dbaf9c28. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R2404003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b47c98ff1d370168afa13e040ab8e7fe78a52eb6b3fa6ae4ab4b4b38cc41e5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR59R2403997.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf6d55ce3e76d78984f6b676554bd211e022d2eda490693114bda66e5ea37d0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR59R2403998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6a2be552f1e1e4491e96ee37a6821cda59ba51f5dfb22ad01741f1a540d1ad. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FR59R2403999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c3beb2e97b651646f30786f88b7137f6f6046f026f1f5afdd974f2de9bf78d. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/FR59R2404005.