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 0x95e5da7378836790279bd6370be131073cf7d20c853e0c78c6213662476bbb84. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9c1a96f-8d4c-43ad-82cc-0a37c26989a0.json and https://artists.proofprofile.net/proofs/artist/f9c1a96f-8d4c-43ad-82cc-0a37c26989a0.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 0x070a1e35391ff558053cdbbf1748a904b3582571764da965bfecbfb6f76f2fe1. 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/QZTAZ2418239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa95dfabe523b2b7f1e73fbabddb67bc731ab3856d68df3c59baad3c7a325cb. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:26:03Z), 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/QZTAZ2418241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f5666edae0ba1938e9957d6a8f9dd01aed04b3f7e04834080fb19217079f0b. 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/QZDA62574899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7fa142d53310c4aac810516624b6d37cb60fc09dc5e0b3e0e809b709cba0c4. 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/QZNWZ2590449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dcb1dfc911934cefcec7ff52684cf3a2f2b8c4699908f0a517f49356d5e661. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWZ2590450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe545c473b5a1aae9379b7c85c56c2baf9bab7f6f0f19a260322072f136a32a7d. 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/QZNWZ2590451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3178f03a3de55cb859d6ff34db2d005fd54331a58a41b2cf3263c9c2fa4e5b. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:30Z), 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/QZNWZ2590452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26442e23ea0a54430b028c448b32f4cd8dc6630c9ad1313f787d1bdfedd5f92. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:38:38Z), 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/QZNWZ2590453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eeb7f5d9a52ae4ebb29a8d07fd925c2a5332239a6c9b889cbdc6f245a40b8e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWZ2590454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29106de01e93d7d08ef232e6bdde1a1076b14eb892db73aef30227c1f9937efe. 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/QZNWZ2590456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99062a2742a95b11622b86d4e1a1a0fdfc4b6790caa772d08d9e19144952dbf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWZ2590457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6013ffad1ad8ae8e1d3fbcfd5781daa55eb8bb2bfb0fd0bcd22bc6ed8649e621. 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/QZNWZ2590458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30744b9ab2c8e5bf25dd251286f93cf1f1881d2b3d1370a876d209ee26c66dc2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNWZ2590459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bcf4870584553feb58d2bc5c6d2ee5b2505392707ae1fa06bbb11a2f9d5091. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWZ2590460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abae768e989fd6b7c3f2e06e2cbf4368b09e8ed6869bf090ca50f332c0bea5e. 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/QZNWZ2590461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfc9a27f995050aa93d7aaec3bb21f9cef05575c12b2e27e4fde90f5e6eb65b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWZ2590462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82dfef112ee28dc34035c3f55bfec9fbe6e735dd452f2baf3e2ac717d1057f5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT6ED2599286.