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 0x9117ae3710f031b2a4debd2bf11771a6f0bccaa0dbf3400a732d56fb14923a73. 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/038af37a-fbd3-4887-94f9-da894b452716.json and https://artists.proofprofile.net/proofs/artist/038af37a-fbd3-4887-94f9-da894b452716.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 0xbc38e7050bd136ca07ee3578178fca5ace4be67d229cbb5cb65a1dfb12ed93a3. 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/TCACP1669431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192ff5e789a19bc383a8edbef3d6af02b55dad270ba28a8c7b1b619ccd6ef32b. 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/TCACP1669432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebf58d2f7882a19ecc010a4b64554739dd1ef1234dcfa286a167b96f071a838. 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/TCACP1669434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53160ef5587184a34f01747b504bad6ad5a981de085d46c0d73a1e2e6a8c6c47. 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/GBKPL2091678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310a077b4685224e0ac966a089c87393d70ea014e5d5346df7c7665a3f1379fd. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GBKPL2099199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa80e848a5e52c9e9935859459662e0da856419fb6d1e865396ebc3c82b2e39. 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/QMGR32002001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db8219d59b0cae54bf19767967e7a79d2eb5a9e4ee990826bfd013c58c4fffb. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QMGR32172610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6242f09fe329619a7a5a63dd5ee5c5e89b32e54d17b8d145f85ab0f54bbc2765. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZSYP2160014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80867f50e7c08aff962113dbf6fa805a857097005b9c4a0ae6a74861d322523. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:58Z), 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/QZQAY2204513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb257cce8082ee1710fdcbd560a6a6af504a2d5b7cfdecd7701e88155b41f1c04. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZQAY2218261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7536bcbab56f4b2304149d6d1f109296312bdf8366d7cdb5ecf54faee103a3b3. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZQAY2224495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69544393a1ec8737412bd24965e6ee4a72a82ea7e78bb2dc7acd70dbbc49a3da. 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/QZQAY2271011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a80bd6ed73f254e4e096c4d8225d141bdf4093b1e477b6b233d7e4f5afd3c80. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZQAY2200523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fce112375f6025d4b3b4cb4ae25e18b6be2cbd9eec9a93f37762206704edc44. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZQAY2236912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4524eeda61ef8259fe0d26b6e772da47ce184bd988404102d050ea9cbbd3e245. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:13Z), 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/QZTL92368682.