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 0xae332670df8544456ec059a98e06a8aa0282b738fd5f785c5265a99dff7483a5. 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/f447d331-6a40-4a24-a217-48e9fcf78e5b.json and https://artists.proofprofile.net/proofs/artist/f447d331-6a40-4a24-a217-48e9fcf78e5b.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 0x86ca19c658e2f5a6ad532eae61e45b01588cca93c526d8cb4597cae0fb92b217. 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/USXXS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87069ad0654a0b6751614bf29f212f0bd464c39d4f324bc867ec90935fb85e76. 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/USXXS2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69611ba5f8b198fca7c13e82fd55c1e0c7be9966e2f3d7e15615844f713ce477. 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/USXXS2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c44b43a2876e7f73314a4423debaa3e559bf771aa9c763f982f1d22a3d05f. 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/USXXS2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae7e3608e1d64acd27e172150fae71afa53a93c004fe8e8e0e92a938fad67a. 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/USXXS2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010a1978f2cb998ed3b7ba8f5f979fcff00ea958c28fc1a0fac1ee045ac1695. 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/USXXS2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083a0c69618ec2b4411d6ebcc98f28fb0d5a591eec111d29d860ac52d2b7219b. 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/USXXS2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0902406074af00c3f1d7c8e12bd5f29926b9a683cca1549ce0d139744e553d9e. 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/USXXS2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69611ba5f8b198fca7c13e82fd55c1e0c7be9966e2f3d7e15615844f713ce477. 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/USXXS2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ca19c658e2f5a6ad532eae61e45b01588cca93c526d8cb4597cae0fb92b217. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USXXS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1254293b051408f315c70df370c68c45e5070c45b7f817d30c62a2762b8d3c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:38:54Z), 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/DEAM82300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1685a697f0783ba78081623cfdd0f4134b4ff86784cdc0e470070903dac3d551. 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/DEAM82300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c3567d2f1d79747c74a2bc05380329522522c6504928cd179c53f41ad6c388. 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/DEAM82300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fde310fa7fbaa0c618af80c60935d0b4be00506fabd7066830231ad03ab3e6. 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/DEAM82300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03380ca1cefe65028374fbb3ae634ba94c3dd513b6f231f21fdb403ed29be17c. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:32:15Z), 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/DEAM82300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320545faedb90621d4f8fdcc4a2681468929880ab4ca4fc345864c321508d163. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEAM82300021.
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 0xb44037509b75a74b941f1d7899be65028522469ba279628b3f665134c9b618e8. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEAM82300027.