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 0x1a23058b4c3b1f71f8936ed678dc051558dcb0e2e46578a77a434daaafa920df. 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/af9bcd2d-fe77-4fb1-93cc-4e9b4098bc14.json and https://artists.proofprofile.net/proofs/artist/af9bcd2d-fe77-4fb1-93cc-4e9b4098bc14.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 0x46f5a81cf66761da1244473ad38b444bbe288c62da8df8e25aebf93d34cd893b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZPJ32353416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3662a673c44364318518b52c43b77e2b504341c24c30244a0846d27026a2ad. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/CH6542420132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad17db94523cffc1655439c615452d6155886230fae4eab3d62151d02d2138e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPJ32357980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3662a673c44364318518b52c43b77e2b504341c24c30244a0846d27026a2ad. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CH6542420132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ccfdb3e6f44b63eaa4f91a37be95acd12b066362525d56c60699a9a630405. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:10:26Z), 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/QZPJ32357982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba94990c193f8f186e2cc691ac5006dd83721c721a614080ca886c3c3f13f167. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32357983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04348b06198535fabf05abb42a3e03cfb48be4d047f4202ba2aac5dc05f0325b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPJ32357984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61441e0cc6bb05cc3d23fd635a4f1d1af4f71ce0be0dd402bd39ebd21227fea3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZPJ32357985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedb8ade87b77471910e80b30802b941d9c4f79d049d372ff962dfe79d6afff3. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZPJ32357987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4122e59f64c7993d3bfe33ba012e142217419c00e336b2f676f17717ed2c1a9f. 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/QZPJ32357989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627e642e1c9d9ea552ba84947129b7c144a18eeeb14914ebef27b6aa884b056e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZPJ32360655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e75626dcb5284598d45697da05fb45dca6aac77be9de2e4701b68712409fca9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPJ32363283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce734a0589ca88992fdec619d779da026555d5fa176ba12a9f160b958e8a95a5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPJ32475756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd28e80fa9a7999394007f5e2e34dbfed1d07eabf5f9dfe7bd2764f5819e9fdf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLV5Q2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3385f83e9a72e4283efda24e1e479e9a6a8b71be64082f55123fa9eacdd1b9c2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:28:32Z), 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/NLV5Q2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7e2401abcc9189e1778688272545af4d903755da432d1d3a224c7fecb3b1a2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:20:30Z), 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/NLV5Q2500035.