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 0x658b0c147b0a5c76d8753c2a130d88c5cf0da24182cd89507985bb6d8a65112a. 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/ec1fcbd0-78a1-46ac-803a-ce0910f0d7e8.json and https://artists.proofprofile.net/proofs/artist/ec1fcbd0-78a1-46ac-803a-ce0910f0d7e8.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 0xc14fd2e696b4fc5686a6ae10a2466a5c59e3c165bf6f0e7acdbdeaaa5a07e6fe. 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/DEQ121857366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63b138bee590a10a61da5fd5408ded3e67a326dc8731a78c50dc95a53bfbffb. 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/DEQ121857367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319ec02f644346ba10bfabaa46c9728425627a3842250025a67e5c59fcc9d852. 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/DEQ121857368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef295f6dc03da1b09b4ef2a9e2f8b432db604b40fb2b8d9432bc8a4d4e1245b. 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/DEQ121857369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a161a2c7fbcd04c4ff03feacaa8e1787ae4a05984dfe7e82deb98e4afa539f6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEQ121857373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05a91ad180e2a8f1b5c9490730393df4ce74bbdde03625dd5c1a778f2b17d80. 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/DEQ121857376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d62a472cdc5e9eadcf398e6e067520e3cf077212ebc2e308c86cb18444e9c30. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121857377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9634b836e3f81dc3a8f886ef20b3b15296dbf4ac99e2804868d98653b06c76d7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEQ121857378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea40b5e7dcb73d2a5d3894d7c51ba8855077a281bc7cf39168a8b9cd161330. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121533429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192b513d96ab76be86740e25cfaa8c92e42043c2319a2ec915be1cfd28d9429f. 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/DEQ121857691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb72e7c5ee6baa450362496e61ec600f05ea5f538b760da0cf81c05e35873cc5. 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/DEQ121857692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee921b6c20aacba4acec9e5e9f3ef0e4f79ba785cfb657da8b8d7c40766b783f. 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/DEQ121857693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8392cb900528ea9fd7ee61afc00ae294d3eb97a46fa7f7c1f0d61c39301381. 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/DEQ121857694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15385ea31bba33c9c019ea02365c21b636dfd4ba421db44022e95b3855b565cc. 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/DEQ121857695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d4d220a0948ebc208a8fa7b5fc85e709215cccae55e936140495d8d4ceed13. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEQ121857365.
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 0xf46f102a1b7254a72e18d719b0990f1a0b5e6fd67ea7a2e25191c1b6aa6512fa. 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/DEQ121857370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbb8552d27e529cba9c10fae3fcf475f4f8ac9df48ff357d5acd56da724cd13. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEQ121857371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05ba8ac2946cf8b6e5cc4e6f84c4e7d1eea8f47ed03106beeec69df77cd68dd. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEQ121857372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1ea22b4060e1e6ab009e39d2ba20201964aae7eda1fa641d91f1f11e0b1ab4. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEQ121857374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f763b98d3c100a8dfed6cab1ee3d977946a5d06d5eeb36172c1d3a5027a4b71. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEQ121857375.