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 0x3be0f3cf3c4570ce405deb68b7115ed8dad902e5168280c6c55efa15874ab5a9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/320bb780-2ebe-4ebb-a0e4-8014313007c7.json and https://artists.proofprofile.net/proofs/artist/320bb780-2ebe-4ebb-a0e4-8014313007c7.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 0x6c26c93a88ed6d1a10fe84b6a2f5f98117a3a29e70891c0c1f6c7c9f8a5be252. 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/TCAFG2072441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc154b8cdbbed6f94269bab11b151bac051b12e8f2134de212598a5b9e727309d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAFG2072566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718e5a9b5b925201fa37875bd78a334380d756a4741164ebc99e265334525ef4. 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/TCAFG2072578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15ec516dd7a05d88592d621ba07946373ef386e8570ed4bace84f98b17be37e. 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/TCAFG2072588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2baab51df1d228344f45ef03dc7b91a5f82f39bfe6906999c97ab24e307622. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAFG2072594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138b62969e340cccc0ecb4c9406677faa0d41e5cdda8dba2c04fa85f9c184d91. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFG2072598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fd6f90345c811132566151d37d9cd2c952eb9de14eb8413135a3d38ab9f821. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAFG2072601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e93328ea19bdf182af04615d865addc06e4aaf940df3cf3b914be0de5747b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAFG2072602.
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 0x06f15334475a5e88a089f21b1add0520138c10a99068b9b087f428d0516b5541. 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/TCAFG2072605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8b3f0d7c274872a804d759b1273a34a0ebbb5826f9ea0a11d726aaa86d0ab4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAFG2072607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d45c1904c321342bdbe07d71d6625ea2597c8c1cc01ccb88f45bb870990585. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TCAFG2072609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2428b150934c55a084ad99c21f724920fb632fbe0075d7666783c14e7d3b6f1f. 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/TCAEE1964938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6277f78d693f35269490116abf246a8bbb340cb83b38c01360382f23f0591c3d. 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/TCAEE1964942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171a03b25d8269d83e18434f7e1d7957424a5db9e6d6a361b1558bb4b08826c8. 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/TCAEE1964959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc939de5b5ae3eab0f747f5fad6c79c9216c1e043459220827892235b2e289ea7. 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/TCAEE1964978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a43ee700abdad3bcb2422bdafdfad5456b476ab67213df66b6f04aeff4b49. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/TCAEE1964935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17895b1f2284cee8997773cc23e3c1a5e6cb8f17175da7351cb5c597df1860c6. 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/TCAEE1964947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc32a08942621816545f6e7b9eb625ba0e9ff4047cda908937bd8984734c665. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCAEE1964966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c93ee99beef8a40c7ecf6a7ac08521059b1c04a090635c9038443a6b828d8d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAEE1964974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfd6caeaa65e7c20bacfe70d84f1e94a828d9f6a3248bdf6469b733339a8551. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCAEE1964976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aef2e59f31fef7ee70858b53dc2e316b7172adc9e98db605ba80450be352f4. 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/TCAHC2392623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4e87936b4b25bf04cc56cbc0e81f8aa770b7d6448bf660eac6c0d7ee40112a. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCAGL2295774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845d959ba98cc48c4d8fd11bcb7524ba64c1cef60be12ff02294e96c3115295c. 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/USUYG1426395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102007c7a1c35d0b70611d46c9078f0495f1ba0f179330a01171ee335cf2909f. 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/TCAES2004498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aee92ee8139d3e7aae7368c208e284ba3c48cc399fcfe4b9ff8aef0abaa20ad. 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/TCAEN1976417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2237ce212ac50adefabf6bdfe0944d3f923675944f8d6c301bf64dfce318d52. 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/TCADS1892779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc68f212084f10a860460a5207f715900a97ff8b4e1bac493331742eb5cf14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADH1795160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd86393549d627fcc90c6842f614a3fd61bee0a9b28fa3cf99486d86306cbd03. 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/TCACZ1768703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a330f2f7f925fa2934bce8214691255736cc107317ab5156a786f9cd32bd228. 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/TCACO1652691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7187d9550e9fa4fb11aa7abf35843f9452d955408e6dd22425277f9e6571c6cb. 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/TCACO1652688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270c2b5e5c12c81a94bc89b8863c60e4cb87c8d962f6771a8d04f7f1937495bc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCACO1652694.