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 0x6a327993d29d7381c46c9ad1b7a08dd067df3695966e36d712139349e18b8a08. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3f201d9-b502-4e21-8ab4-e35feaab56d0.json and https://artists.proofprofile.net/proofs/artist/b3f201d9-b502-4e21-8ab4-e35feaab56d0.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 0x491351902c01d15f3359b4eeb47a795ef7267866e2071b2499a4cebc324c89c8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCS572200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053da3f6221b8cf615b57fe8544e886a5606cfceaad93688e1955650ad84a6f3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BCZER2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0620184893cdf215e91f6d2314494d53c1006dfc487e452782aa54629596749d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCS572100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd0e08aeeab8ab402ec788520f26aaf2242180b52b76e481f60c6863f578f07. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BR7552200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae9e3d20d89bc7546cc633efd5581db2237a85458687dfd6baae86022c8b03. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BR7552200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750d6bb37825c27a818a0b186b1744ccf0b6d18b64cb49049f96b0ff796d4872. 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/BR7552200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59066b098699ca59b834415383108a672677d1120a522746c00b66b9c293e21. 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/BR7552200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9103ee1912506fa7e290489deec297b0f5d51dd907a0fc4413f60176e25dab5. 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/BR7552200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1321149aec5ab8546e53f32fa9e186c21022c353bc20cb1e85809d5383be5c0. 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/BCT1S2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daf12fd2673d6e35da16ba1cdab439f31279b319b461d9f4cbb7eae15db398d. 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/QM3DF2198745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83395b1a97115f3049f0244d534bd743de28f0af5a16fb706667077cb8f7c2c7. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BRG722300372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa5459d0a865be9ae44cf9916464c4fb30e70bb35b967fa89e591c2766c969. 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/BRG722300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240982ae6ab57a14f4223141cd9b56480f0177f47f7fc74d27b9488f15da0bb0. 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/BRG722300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c060bdad03917df9344b1828a6a3a49344ea08d0065426e3ad44b74c367d6ec. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRG722300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2967e059715f60705d842484a0989678052ab76e1c1487bd1d3c498fc6778ed5. 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/BRG722300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a913d869080a911ad8661f4a2f4d35e7004840841edc05dfb85bd2bbeec63a. 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/BRG722300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2c4f7df5153e91ccf062929a2e3468beb490d1581d07981f053770e835a04f. 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/BR7552100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c84091cce8ce6eca43c974133bd82202646d12eefa6ea6427ee96f16c6b563. 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/US7VG1712582.
Cwb em Foco - Lembra de Jesus na Ultima Ceia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468e6e19f159538c335f7f41c55dcf9ade8a5c745813decf0989277b17d56c69. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BR7552100078.