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 0x6ad08d8d351a6cd7a457975c2f0f718dc17f7a1cb65702afaa4310e335975946. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d30ad56e-85bf-47af-92cf-9400bc00d8df.json and https://artists.proofprofile.net/proofs/artist/d30ad56e-85bf-47af-92cf-9400bc00d8df.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 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 0x49d1ffa5e52899da8446755ca9f5d4c79439945b9aa86b543a48c54dcce57597. 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/USHM82257912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3c1f7276d22b50e61eb92472b0d3406d2ad9a04cfd371fc580b96e290bbbf3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM82257913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962f96f602face1456ae0383eb4bf5db789d4f1096a911770a47595a60b4134e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM82257914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848cfa2b4af59ac5aaec88fff43a29421b22105b76373d97096e1e401513e1f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82257915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f365de5ea1410c88e57f8bc8a3145672b07bf0a89bcb98a1a56ef5bc6abf340. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USHM82257916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86b09ce2e3620a8150a864e5202008c8f3b5494dffa3bd4a6155c315e1e152a. 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/USHM82257917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf191e2b406a520cf38f4b9147f4f1625ec99a281b0c378fbaa5671fec383bbff. 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/USHM82257918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585a0bac4334531dd9a11165a00da5da386c953daa55dd01a6208ec7ebddf70b. 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/USHM82257919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec821a1aec7d80035619385b274ac82305b5373c62da629267f419795176f5a. 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/USHM82257920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28101616f59bb7693f36a40c502bea7b6aefc666b0acaaeb26fe39d997c1b4. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USHM82257921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4642a5aa181fa8f73afd9c7ec0d757927c8cf7edc65938abe8b91031484498ff. 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/USHM82257922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d5eed0488ec8da8245a302e6700a4075d90d5a534c6356f51d3b611b90b955. 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/USHM82205338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac5666a8aed6f5e6e320c52150ee7605ffc8ab5261d01ab8c51f99251dbc898. 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/USHM82205339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4cfd4629eff54d0ab2a8b625aeb6df3afd97e8188423ef6d7eb3b16f3f9efd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM82205340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f1e026cc5516ba38cbe6cd1bc84c44256db6644929f384278a1cbf2b6143c7. 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/USHM82205341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55acf22ce2488994f6fd6d35f92204a6333819b466e2d5b710b20e4365472253. 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/USHM82205342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039996f8c88363685103217086c5167b2a2eba36cd40e121b160a59fed9f6d38. 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/USHM82205343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeb5ea4b0b1e06deabdcd5621ecce418a42baaa343d53e6b8cffb3eef3e6c8e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM82205344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed19abbbf70d0d0ac80e5ea6afbe243243fc1844b0a5e9bbb07acb60bfe354ee. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USHM82205345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfacf4a4bfa92903c84a99a07ea029efad1117d1defad1a7f0f5a8f7c119755. 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/USHM82205346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37e305e543775a2f2237f767bee862d80308f2d408805fbcb8f10a318520fa4. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USHM82205347.