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 0xbc50c2991a230ac1399477ffa1c3c6e5a1862cb57c26222486c980eb5a1192a8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f45f4cda-7f03-43e1-9470-9ec01cf3ef43.json and https://artists.proofprofile.net/proofs/artist/f45f4cda-7f03-43e1-9470-9ec01cf3ef43.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 0x5fc1834b2a5f4e2a75eabbcd878d35a8e5309aafb8ca33704194478aa1bd6d69. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USTV19800232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd922deb34db0e3734dc8dcfffe4964e79d770e851023ca076782181b4b26a88. 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/QMBZ91398943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ea3b6b694c40c5ac9f282775241e1b8f91ffc8919b16c6e6baca7fb90bf65d. 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/QM6XS1576403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c01434129254afdc6918a72f13d0b136020b1df3bb1dd16f264eb4e3ace631. 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/QM6XS1576409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cafba79d47f47220eadc878d5fe3370056c066c4beb6312074bcac81743fc3f. 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/QM6XS1576958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcfb2d47706e0788280f926c1e96ecc755aecada86a07e2fcaad9a2e62cc4a9. 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/QM6XS1576959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f9d94c89c373756c025822785e349e963ee58bb7c6a1579ed2d189fb1937c9. 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/USV351495070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bbc7fe8479c544be4c95809677ba9a85a99d553adcce7fd1e1fa80e735f795. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T19:01:13Z), 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/QM6XS1576937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf5164545323d66c4eaeec62889c3cd6335e8cb478066ad2e1e2e436574b143. 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/QM6XS1576961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1218a4ddf8bb73917a3fd9b9dfd13e5a0b019ae8783ab641b8437b64db9d5d3a. 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/QM6XS1576943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f95ab59424556ba4de16fea1145faefa92a2bf6a84891c694dfac08211bf1e3. 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/QM6XS1576944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ddf45ccca0ab9769e065a96b0320b2ceb42e2568e82fb1ace634ad243b032f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM6XS1576942.
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 0x13bf26e0559c28509727f8aa90ea262b64bcbf5f0ecd7d011943b2758e54e172. 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/IETKK2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3f7a08736aeb5efd36f5a6003af5a788545c3a8c2802c710e1e3955b16a854. 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/IETKK2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b829bb1494f83e39817493937b3fe26044a9c4e28cb23f91605acaaa9c8fd8. 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/IETKK2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6833f94adeabc93e412197cbccd13847c428ba673b84725ae14a11db984ada. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/IETKK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd1d0ecdade5852af52882b7d17db0a8cedeac002aa8e80f52e89692be27b8e. 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/IETKK2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1221dbd159d160abcd1f5079dc2ef8fa624b0839ce29369f289241faea1eaf. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/IETKK2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f15bfb8c2d79332cfb906b5ffa17cada08e5a717b72a395a8c0511880c288d3. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/IETKK2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe079c816b88127ba1a96f1d007cb1ac0f1d7aa82cedaf873f95d36cd3f63d350. 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/IETKK2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a19178aae688f67cfe153c131bb6b58379ccc8d202f11e7f7934e01a6780e8a. 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/IELUZ1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0716cc64f29da01a2f60f87d1530d1b8b1141a749cf39e9399dfeed3be2df4a. 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/IELUZ1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3d477fa71a9a75f4a96a4db53eefc208cd446d8821c3caa95096edb22ab622. 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/IELUZ1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77164c2583a6cf25917601aec5900a7caa0f614fdc862061ec4703eca056701f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/IELUZ1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543bf53e0da3bf9eed0f87a99c17a445003905d86cd2e9b86ad1368a998aae4a. 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/IELUZ1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e57648c30ea5422e6f9be00d66b2eed327ddb7dfe90ddce2b716ae96977504. 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/IELUZ1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72e41260f9f4b23516b8c86c59cdb7cacb984027a2ac9f0eecb9709e97b955a. 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/IELUZ1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3a0ae4603400135d6f6a0a1ee4e019438c1a0486d0544a14a409c6d014386d. 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/IELUZ1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8bcce37b983da446a41989c92c2d448caf2130e4dd43f9c195e155c931df77. 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/US6R21346798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72c1997aec99b959f1da1db40c393d9ab4214124880a5e7ad5a91298c1d859a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US6R21346799.