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 0xb8f293f9ca1ac051aa21804ed8901fa393fe9a5c9aa52cb6178c74c1368d4398. 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/3bd983f8-5d3c-4a23-9d7c-b6a04bf3d782.json and https://artists.proofprofile.net/proofs/artist/3bd983f8-5d3c-4a23-9d7c-b6a04bf3d782.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 0xe74a61e5f9f8054c5974fd526bf2718e6f4b3699b0607a7d032f3a8335b9ff80. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEUJ81600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa3e746bf2a2a83b3c7a6b1079bdf3a4ab0d27db152403a702908b9f1108f3. 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/DEUJ81600117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64058960970141837782097a7a5b094eba9385cb39f5b87e3ff54e04bf1a322d. 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/QZDA82131576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11368b1b7e18baf21b36589f3f589684c1a45c702284939a3f1483b12f24d34. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZMER2180848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebfe26dc66c4ed1696b7bc55609279c1e0233f9c7ddc2da609b36a20ab7129a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZPLR2198517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c1aaa5f4e7eb6e49ce6657237f81d893aae777d049e5036479775abd5b3b9e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZPLS2152763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad40cd4c7471c2aed5bf1d0459de10c54cc8b24665f38efd72549b9713fea170. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ22387843.
Hit me (Alba kras & tony t Remix Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293c5daeb9a9ee9d36a23c09e788816245638f0bec354061c88b6e691cc4efaf. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZFYX2446566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8687046ebd4b0967fb99564ab02060e78087a1fe8b5fd686b96154bc76d89b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYX2434087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc347f4e1044a46e0b13e22baf3786a19f69d33a6c6efbadce8f7b5bb69941885. 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/QZFYX2452140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d2e02ff8b2044bc9c9909a1a5906675787fb1d033e1d5edc2ab52841ed3591. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZTBE2491649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4fd816148bf86516f0ab0026ba2304f34b2aa10307629a6b05e3710e0a64b3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYY2539094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa196911fc7c32167d68b74d37d238e1a6ab2949c345ed9ba971a144f9d890905. 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/QZFYY2538031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a54cf36322ec99d331b63305984c7f15ff0bb162241feb7347a0b24a4ea34a1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ7X2562803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1978ecafd4bdb2d3e9ebcc397c704700f765efed3e803b01e2587d40c27d0e4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEZ621400392.