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 0x99f7eda46369a812bc4600bb5681e948e1bc48bdd0edcb376af9216b729c0504. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d536956b-830f-4662-ae58-a381d6dda316.json and https://artists.proofprofile.net/proofs/artist/d536956b-830f-4662-ae58-a381d6dda316.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 0x5dc5176c4d564c99e74156bd4e6383ec79a5a3c12a4f4bf40414857036526760. 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/GX3Q92168825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2922546a074afc24c17fa4a812bc134fab60063968a7163fcd668bb74fe125. 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/GX3Q92168826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a1b5e95b0b1b919eb76d2eb33a4ea88d1e96348d73af14d78b9071b5603e6e. 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/GX3Q92168836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2487ee74fbda76a1adb2af208b0364ca92f27627fdb790fba8f9a9a77e9d2f47. 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/GX3Q92168828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2302524aecbb37a6207378d7a236a17d9d67968245b107526c356de8f38d98. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX3Q92168837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4bfd48086a2d992ffbad1c8b0b8ebff861d6ad01c25bde321964eb4a10c1c6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX3Q92168829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00ba60a5e3c54b43b1ce8c45365a99969eda490217f3795d0e402c52c327cab. 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/GX3Q92168832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160b5d7e35ba1ac367cbdc799c2a9b038b73510dec65a2fd169844493f571fec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX3Q92168830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf774c2e37e2ee30bb87cb22d755dacc351ad04b5986e2f8fce8d83138a02ccf2. 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/GX3Q92168831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4491451ada8e5120fba80799c2fe88f9b6ad2041d04e9d20be7c40a4ad8ac9aa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX3Q92168834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33894faf6e7dd25c6ab958ede5d6fb5a460cc579fcf7d85bde432f4398e882b1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GX3Q92168824.
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 0xedbe73b36070da7c395e61eec9827e0a8bc184c9abf3e4fc68760e181643b66f. 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/GX3Q92168827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b42112c29aa5c19fc9e86eeea9381dc8c856d21dd7ff77464dd6fa5895388. 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/GX3Q92168833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef716504f240137779816bcbe594f01ae2b5f3d293680d3d5fa7a20e4e7c4f3c. 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/ZAC011900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f010b78bd374914b4ad30dde466e3ab885f4fae0be6b4f20fbb221bdec2b129. 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/ZAC011900126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10024b4b068b6a8b6a666e0c39f7941be699bed71c0f2b1f1ae79e278c8ca639. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ZAC011900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e35ecc8d7d33ffa4ff42d24f57d77f9bf7ad24d8b7111b443b2da24f49269a7. 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/ZAC011900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cde711e81ccef25d15c449690f2a2da792b1ace34d6cad7080d44860cb951a1. 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/ZAC011900136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0dab329395898de9ed59e4833b66781999cb2e50fe96b1de4757694a42d826. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:57:00Z), 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/ZAC011900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2920b527a55e4897f34bc4a9e41f55f16da943ade608a694586948bcafbf5245. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZAC011900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055bfd7d9b2dd9f7726cf34e86907e73c9f10c5af6b382d9ab51ba116a8dab92. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZAC011900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeed387641bf7750f6dbdff7b97aedededea2f4296c222932cf54922bd9c7239. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAC011900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62379c0892fa1325a8abe2d948c0d36ee77009855ba247458af6faf3f35d7b4d. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ZAC011900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43375b82ff53ca8e0acda432744108431d41fe6bd22768ca72fcd702fcb6076b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZAC011900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8c8ad1469b77007338eed1b0af62faf7f0dd058622dc92245f36fba78f74f7. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ZAC011900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2e3b595bb7a5bd4906178cf3fc32b8123d71d8221812a26c5dd67d87acb7f4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ZAC011900135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb37fd4ba9897d42bde7eb81c67eebfa87f9f70ca10a9af941fc2ba4f0ea6e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ZAC011900137.