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 0x0ae740945990cac9dea983211772cb8d0cf535828994e835195f2188cc5ae379. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f68056b5-c12f-4882-b58c-98a34832c553.json and https://artists.proofprofile.net/proofs/artist/f68056b5-c12f-4882-b58c-98a34832c553.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 0xcedce0d2352b2783a2d290849fb8de2bdbe7c8c55ceac0d481813a1a7d698205. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/QZNWR2033727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedce0d2352b2783a2d290849fb8de2bdbe7c8c55ceac0d481813a1a7d698205. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWR2033727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bcc193f30a5077c4531958f5c7c71afe0a8265df82d8476d124a00d7647641. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHNB2174219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7bffa80b90919b55cea7f39f31ea9dd66f20f5de8bac29e221d7dd73ce86f0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUYG1418705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45ec3aabf4d28eba134733ce72345b860e89105b17270165ddb28701abc8012. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUYG1418708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bcc193f30a5077c4531958f5c7c71afe0a8265df82d8476d124a00d7647641. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHNB2174219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c160c4d32b009e3e0dcbd6eaed716763eac8b3f9483e78d6ef1a5e7472d1b6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USUYG1418707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa649906af5341b6792312c90b4966ef3884966d0489223d27d9964267cbecea3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USUYG1417861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc096cc07ddcf33a6ccc2b7641c83bef39f55344f10ca635b24a8a7ee7d54fa17. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USUYG1443536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc096cc07ddcf33a6ccc2b7641c83bef39f55344f10ca635b24a8a7ee7d54fa17. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USUYG1443536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dd56ed92cd58f52732c7c0d40826099d60128a1e361856bf8b76f575278c6a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USUYG1548341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dd56ed92cd58f52732c7c0d40826099d60128a1e361856bf8b76f575278c6a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USUYG1548341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b00d1d68337ff608f42654afa84323fa1bf3f4fa056d5c95ba3973686e1b2d7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7N2437512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5c74e42ad08412edff5af21e79f05199ccb492f37327aeac6f2db572cb6354. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7N2437513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdac912ae2e63764306fe779dc610e1207ae86153f98cf33d3d00dc59291d1a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/LBA0H2012060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5ab5236514550799d8e208e7fb587244e1142a9edae711563ccfafbf0f8e9c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/LBA0H2012062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d62cab8f8235de28ef83dcacdbfbddf7e2811eec242ec06acf425eb85fb2c5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/LBA0H2012063.