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 0x1c5116db2a4bad6c3773d2637da0dc7b25a4cb074e12e9a11604c358ac434721. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a367b68b-7871-4127-9a5e-ac2ddb3942e1.json and https://artists.proofprofile.net/proofs/artist/a367b68b-7871-4127-9a5e-ac2ddb3942e1.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 0x794853efedd5619118055a881543304b0fb20c44818a758e0e6251e6cb01df49. 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/HKC371642896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaae105a61a7d4dececfafccc45f95b64c12902f2567cf4645bb241b9829f8c. 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/HKC371653292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6c5f48e48e9a572aaeac56f92eb8092fdfdd3514266279e74546b447e0ea73. 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/HKC371642901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a484940bebb2d93b65be7803d18656a0393977bdc59ad0d4b4dc6781df90f3b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA092361180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04f230bd944e610d481440b0dcd2a689292a24fa65c69335809a8dd83a059bb. 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/HKC371642911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b1ac1aac74be8644286c85830a334612bcbb978a8fabba388753ed87297846. 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/QZES82019930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a65ee3206a430e94befb2d6f3710ec97da397c5c0cfc598f2cf39ecbecc1bd2. 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/QZES82019938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00bd5f849eb534a8189aea0c1cbfb5d4a3d3673ef45206276de1e41ded36ce7. 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/QZES82019926.
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 0x86d08391d733a8a268040c21090df297d52f3096ab40108a3566c6abe9838488. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZES82019929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6480693f632b688eaa48fcee77259a5061ae61b39c8b907ee82798b9c30006d8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZES82019933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaedeb4e3e0091c2aadc3e2ba5fa414a9754e3eba74d51f0ac2acdfc0ba73e6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES82019937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bfcce4171cf66db6e518bc9f8fe7dad9355c7b96e7b30061d032df4c758e33. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZES82019939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b676ece62ce69070df364171efa319bcb34cd1b0d3feb1d51971138afc90b2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZES82019940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dce25d808473865a1430fcb25667ce6cd548ee68325ce421787230c1f81e03. 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/HKC371647223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b47c808e98fdf631c8258a8cd7dae7bbdb5b55b565fe6da2656a29e4f39606. 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/HKC371647224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188f8c745fdd6785bfe7300856382ec2dbc6f5ceffb42ce8f6c632d0c730eea1. 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/HKC371647226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542c08dd0df75e3227e311181653c6c39e321d7352f4c729f5e28c38e6f45549. 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/HKC371647222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b26618168a288bf650c70823c51099d20e3770c6c229a1297439b161f3f9a9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HKC371647225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc698a65519ec1de44928371a8716e71b1191d804eb08322d9d24988964efc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKC371647228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9141ce9ba786aaa369109cfce5eebb456ff20fc068b097eff4ab2827930bbea. 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/QZHN52274293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014738ab745a405f34754d3cb617f5b3fcda2fa9279e84b321ef24fd372eca58. 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/QZHN52274296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf385ee82bfd5087c54cbfed4d34db4e3db2b3f085cdcf674163530edded643e6. 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/QZHN52274297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd674752d009976083b1920c94793bf7485615346c3f0ab9f69a053b13ee1de47. 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/QZHN52274294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b7d876e9ddd0dfa7035e5f4915ed549deb5769c7afb58628311a594ad370ec. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHN52274295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7db1d387ed00c41a9080c0c08c627fbd5b3341b36c23ec25c92cd8cd6be4df0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USDY42209983.