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 0x7b0477ddb28804712afe0c75a56b304a88be4832cc3977c6098564c714dec479. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c07f5401-92fb-434e-8805-fc68be6f2ee9.json and https://artists.proofprofile.net/proofs/artist/c07f5401-92fb-434e-8805-fc68be6f2ee9.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 0xdd4471ee239056412fcfcc1b1702f0fb23c563c8bc20c3c04260fc08c1902ae7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNB2231553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34788b8eff52834cbcd8ef07f57e2a342cc02b844e20c216140170b79e24ff0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHNB2231554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250d85e5befd36d6150e60584e945c38be96b6776047c01e6464a6797b9769f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNB2231557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fdde715b3e0238be8b59f87786a326117c9121e5480fbe45aaf85e4e4875d8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNB2231560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e8a265884351ba059e2e83f8ddb4f3c256132e6d96ca6172fa442c9ec51198. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNB2231562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313b6db4abc8b4c2ae1ef8b88f967d1ee31c909eb6c49702ff4b761539cb3973. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:39:11Z), 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/QZHNB2242385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e4a02a8414f97fb69469c8d78d1b7c39c55e18325039fbb92bd35d50b9eb2d. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZHNB2242386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225864115c25a4fd66fddbd3e1c709f780a444de81698ab2ab7018ec3b6b205e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNB2242392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9176644c471633949ba76d75f43fd845d4e0f36166f3e78ac6ab479dae47baf. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZHNB2247943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3142729360f50f7e8cf007de2ed624e38313b64d8e40b93a4ce526fcc3bc8868. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHNB2247944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f67a834a58031bb64cac647f7f40d730b582a82f0a88f482debbee2f98c7fe1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNB2247947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb16e61a4abb6409f3d0408e68f8ceea66adfb66664529e9529a7b4d8368e76. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNB2247948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b3482e188612c4174d0e7ee7572c5ed5a921f08ca24240af9c7a45327df18. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNB2247952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a027438ada68194b347db654b3d9532fd15ee552c59c7016a14cc4c6fe3899. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNB2247954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829c196eca2becde59aab97f7160a94585a6bcde0821e5b65194ca4c4e668fb5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GXF9Q2469657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b2c399a4425414569a5179c932d739c49f6c639973b250f864d6f57a102bfc. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZK6K2593753.