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 0xb872958d40535ac85dc233079e86b422c7485c17b8315ddae6c2d39e7832c448. 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/5bb70a83-a4e9-4a6f-a5b8-ffe207ed10e8.json and https://artists.proofprofile.net/proofs/artist/5bb70a83-a4e9-4a6f-a5b8-ffe207ed10e8.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 0x6b4ea2da04a4955de373eaf268255a0bd7fde0bdf4668bc0443d6bca0e9b6746. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:24:03Z), 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/TCACE1579068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2326610642a4affa92be99f9b19a48666f9ebf85f9a88dfbd21ad328bccdcf18. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACE1579075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175e6765279c476d4bd217804e982d268176af5ee1ca53ae7a5796cab2458525. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCACE1579077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2096464685cebdfa2a03eda0b43ae9f6165bf51993c84fdb1c3e6813f51aaf3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACE1579080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb61517b9f7d40a6113fd0b28e5c6620c52dc6dad96263784469d41367fcaeef. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCACE1579081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c2ecd1192241e1d75934140c6257cc3d1c3ee02b4cb14e1d057ce654cafb28. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:47:51Z), 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/TCACL1649429.
Real Six (Pretty Lights 'reel 6, Break 5' remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcc6c251d70f28e2861e9dc304b94a69d290b00b7104692d581e0b70d7ec33c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCACL1649438.
Brewer & Shipley - One Toke over the Line (Vibe Street Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2ca061e221cc7e13ca13d404f2411df027545dc3a9f35fe2e08f157567a4b2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCACL1649439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c59b2e42c4ba53ec0e70fe91c5982b44fe4a0f20d3ea5a0889ef0efe37247. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCACU1677971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f116eb1b1ab1052f5f46e9a3ba967eddb56c2a832cc6782bc8c1980d7f8220. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACU1677973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fafa66d509c9ade0a6f114d95eb9a5c0e897e83191585670a15d7f119b43da8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCACU1677975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf427f35551d7dfb31a7d7ed4c8308bdbda7f3d2a57a236c54997bc4669c30de. 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/TCACU1677979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5415574af78822a703304354c6712234de6d8b31634fea409b00a9234c44f0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAEZ2042624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708c08ca52df73a41328c4c842b03fa5e356f09be9f6452eeae7595736556fed. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAEZ2044876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8520bc79dd4cd693a28fc716b0fecbeb17178dbfc69afee04b890733787b768. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEZ2045252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b96c4d9aa48214a4b1e655bb4956ec60cfd3729a6edad1e31e9319297e7c70. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USY242435742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a9edbb33b0779a1ed2d71850a00c20c4de160861de9cb12fff90de1cc70cf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:34:31Z), 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/TCAFS2196765.