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 0xb8f01fd9b84d60bf8d1261d13167f1624455485f2023fc072e63cbb867e2f1c8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/911ab5d4-0d99-4d84-aea2-120aa9d8f9a7.json and https://artists.proofprofile.net/proofs/artist/911ab5d4-0d99-4d84-aea2-120aa9d8f9a7.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 0x5799c33a9042df838c3cb815b450e29b42869ce4ae2dd9fc165ca76a4ef7c2d2. 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/QZHN62227715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a6f1b041117e7494a8d8dec48c5e3e843a1225f6024b77e630767b7479ec75. 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/QMANG2205588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e52090dcd2457c2a03f8f88eff6357488f5b9ff9504a3c639e8eab5c8ddfd5. 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/USANG2235094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b2e12861b91f99f830efa77c091f15597e93cdd51dead24e5bdf980e4055d1. 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/USANG2235247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a3b4ed22c901b51927a78668fb219fd853f98f780c73a1f445a3c29ecdd59f. 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/USANG2235262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16279b7baa693b698824bf9bccaf77140ad8fbeba3eaaeb0b9195855f6487cc0. 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/QZHN92112940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0deb1037a1e795dcbd83ed39bcc28601d996477b1b8814cf945488642de00c7. 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/QZK6Q1941210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8137a820a24da461720748c0da41a3ef3803c5f8dff0bd8564c61b97e0030d94. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6Q1941201.
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 0x09c7379bee4bf4f4f4a2153071cffe5c310bb6173dd806855de1118070a63198. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZHN41975053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d9b072fd6ebd7373fb6ec022bbc05a3a8b2fc446352cc38f012c2e41b5c567. 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/QZHN41975055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76be585a39ec215db008a58a0eed6976e4a2cb6e214907a77673778d7fc91be7. 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/QZHN41975059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068b1ed1e2673b77dec7799aaccfc29d88cc01892560f39a1eb75004a46b135a. 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/QZHN41975054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a068981a314aaa29f6008a8489a48e4e034cfce9dca3c2080c6c1d8cc42aa13. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZHN41975058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4504450b9636388f9b147fd9fc6113176a57eb78e9ae114dfe13c515bd6367a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA41865666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7869f1625bc73ee83ec0c50adc74bc42acb389be96ff0acdded05e8001251f. 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/QM4DW1821594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b15f84c00774bc4f43c1eb7915ab9ea4e8e2b50b2f9a600918a0c0f0075c03c. 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/QZPEW2461929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dd8d302a17fa1ce1e6bca0734db3f17614ef0029fb83f7a532a94cb7767b51. 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/QZPEW2442663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12645a6eeeac5158037b2d27277371c3e7791365ce02f40d2e1543a2ac5a4802. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZPEW2435181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548256238c22d3aa8afbe46ab90b5344a8dcb5fceaa7adde4cd9d54f1402b7b5. 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/QZPEW2427274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e22a3fa31d12873b81d0742c7a3c2f90abfdcb65f688537bc34015a347da6e. 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/DEQ022383537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc9aa9d1ee5b430262b8f81e1d108a56ca5b278e94360db7352a5db2c1e759. 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/NL4YD2300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45079203d381ae55951130a07df9b11bc21a46c455f33eca97214586319505a3. 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/DEQ022383058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758a88f0c440477f18ce3c4a008d82afde5c2221f9b519e6d0f158178564a3c7. 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/DEZC62296587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95031c79d013208f9493a1ebba47e16c13457340f1075737c61c097d7533928f. 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/QZMEP2234926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7538130d8df31bd781aa43d197f78c5599eedea88f8cd2519dbbff1d9cad9b4d. 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/QZMEM2267032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc53abba8dfd2ab2dd35dbc82d90bc58695d1d4ff017b679aee8de732438f71. 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/QZK6M2257046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806597840a5dddbc8be3bb1dd84076993c6336e0938436f53ad28799986f5bf0. 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/DEZC62026600.