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 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 0x39ddb82ee6667eaf24526e7164d5517d7919b21d9edf337a0cddc04c62e1cca7. 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/20131e41-9fdf-4383-ad03-d196f0a40ad4.json and https://artists.proofprofile.net/proofs/artist/20131e41-9fdf-4383-ad03-d196f0a40ad4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chopper City Music Presents: Money Side Murda Side
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 0x593483c789e0d11be81a2dd35e2856ac7e6f75aa13c6ffb4cf768bfc20ef081d. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/GBKQU1616780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab7d8bf875e22de89c1da50967226a22ad595725316c37c86b15c96f3c5d730. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USCM51500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc769457c11c39a40cc78c89cf938ea68080dfe4f5998f4d78b54407b0e98c379. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCM59905038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47719805efdd34173ac77126809d8de0c746e817ae2c3f3ce6c309e42dab2f02. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCM59905010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61a6bf3a389dd89b22fe9e86a7c0b6d9e150a5b23f78a95264993ca2b64fc24. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCM59905013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb03ff24b05b9a8a91c76951343b32d605507a0267a94a69fb244405846d6ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCM59905015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7d27d2cb2a6d08b4c711bcf2762c70903c05556145046f0d485b0d9b68a7d. 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/USCM59905019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a96eaa6906a76294290ca97ef3a8a71cb99be82a2ef8ac335a1bd1bfe6d553. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT20611033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c9d72fbd296123151c1fad3dc1d5dbc63ab29df0a11f33c87fd1def4a96296. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCABF1200666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0d3e039df173af0c914b9d03ff068c431eab493060eb1c6a6df151efb05cc1. 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/USZXT1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961d53b10ed15d46fd09ce3321601fe69451defc662dce28ddf468847c53dc79. 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/USTB10200947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8569bd378f5ba8f5ebfb4542c8fc45036267b192e08ee06652855ced1ffab3cd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USNL80300014.