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 0x9707c055be942a16c6d83bddc9998ec0af6547180011cd561f59daa0f9a1eed0. 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/0040f3b1-83cc-4992-ac81-52389fec11db.json and https://artists.proofprofile.net/proofs/artist/0040f3b1-83cc-4992-ac81-52389fec11db.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 0x5d0b0d7fb6b9fa38738a02857c959af21eba081f09b71eb10b294068ac61188a. 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/FR10S1845606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aac2eac279483a2d5d09a95e9929aaaca081d0e421242d539d1fc7871c46950. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR10S1845607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0544aa03a39094d1fbb9c026a3da06e238fe5f4e0a50704c0c7ade6d31624593. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1D1901027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9526e9cb43dfc55153439c05bb79d78272f694a3bde3027a8e40f530c9a309d8. 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/FR96X1879192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb486b637e5141554c86c86b7e9002d62686062014f31f136b44d9e17d556a64. 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/FR96X1879194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73106af5938f7a3e37119ba2fee01d820add8e7c297c5b6846e7e44672de1068. 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/FR96X1879198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cba72873d9d0321f7916e18e51c5a7f82b6b8ae951282ab8e0a92d02e770d6. 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/RUA1D1827730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c667951ca2547ec46bd4dfa96e6a474428933f91f763b7b86b632d8ff723b0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/RUA1D1827729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113c4dc9d20aa81f8ed5405b3f811fe803f32d508b13755d0c27c10d644286a8. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUA1D1827728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaac642634d073216042d6bb63f421a0318e2ca5477cb11c4e82eca2795d6590. 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/FR2X41926357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7101fecdf9d5aef84a95ce77b2bd74859022c22fb14cac6b07c2bd7514601af1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/RUUM72000328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1757f759834519b9f9c5d73180d9f700f073c143dfcce3d92c8405fb91c0b6a1. 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/QZNJX2020596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa069fc70b7e1e242e4ea0de1df07a4981c2bf1466beca5bde79a27392fbbb27d. 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/DGA082227877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3b2a582a045af0f58257b3dcf29cd1e62d705788913aa371827e29fbaacd33. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/DGA072341038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9bd4724c424f9a45c5f783f3abe15a89851b1f6b6b9e2389f2bc2aac9e61cb. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/RUA1D1900875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6d9d14c09739454b675d018e0e6984e89e228c0781d1332c7659b22a99d21. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZS652358447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b3390704474a36e183b09926619730f685637f0c50ecb37ce294449568bb9d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/RUA582100402.