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 0x46f2b28920184a22e61e9c5f55f369a805b480b4307d5a3012a11a4baba93c25. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae25cf6f-2ebc-4d60-b92f-125fec875b79.json and https://artists.proofprofile.net/proofs/artist/ae25cf6f-2ebc-4d60-b92f-125fec875b79.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 0x94c9dd1297c465e0c8e32198e7e429f6eb048d5039745291e8d051ff5a13d2ee. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWT2469988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd83c0234ebf34af7613d2fff9e375809e78bea453bee61a6e00610af16a6d3. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNWV2497099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237196d63eb3cb71f4192a3b7e6da714ff6ccbe0ba22cd50935c7981ef42dd8a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWW2496724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244a133da32967ba6cd30d6e7e26b689894f10f944e17af5f4b424661141ad99. 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/QZRP52409727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075780fdaca5bef1a6a53b0bd896aa79bfd05843f7a889a53d3315fb1b511599. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTAU2482932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40291423eaf05dc4186706f9ad59880b115a3f2ae969dc63ab94e66242c281dd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB52427132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd818507b9c18fc2274c0625d24ec12f71ae50ea2b5ff0eedbdd232b336ac272. 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/QZTB92449384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdf1c3e94ff9843e33b6238e42cda162e4401e888a7e597421330e06788b7d8. 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/QZTBC2486259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8b246e098c90687c7a1b02c7fd5a34f8ea6fc79f4c9304752935c6a24a97ad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARXP72450093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1b5d082e6f2c8c7c202db37dcf1b36d50a1645090a545a66ffda091d19a077. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFG2426139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66921ffe81851a4c492f93fad7a4c3b54f28b91bc6454e2be39bf93e6c93b116. 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/ARXP72450099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadad3e06cf9007721c576cdc0dae1fed7df19cc7e3be74bc6fb331c755f331c. 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/ARXP72450102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66921ffe81851a4c492f93fad7a4c3b54f28b91bc6454e2be39bf93e6c93b116. 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/ARXP72450099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8b246e098c90687c7a1b02c7fd5a34f8ea6fc79f4c9304752935c6a24a97ad. 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/ARXP72450093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadad3e06cf9007721c576cdc0dae1fed7df19cc7e3be74bc6fb331c755f331c. 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/ARXP72450102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237196d63eb3cb71f4192a3b7e6da714ff6ccbe0ba22cd50935c7981ef42dd8a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWW2496724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244a133da32967ba6cd30d6e7e26b689894f10f944e17af5f4b424661141ad99. 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/QZRP52409727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f3ed47b918eb5988b36c5c2083914371cd25a6774a3f4770a15819e409c1f1. 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/ARXP72550796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe464eb30af73f0064116410882f3dcf35c418f784e4c0474f750f609559d57c7. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/ARXP72550877.