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 0x33a378596653481c669336b39376e95d6c6923e21f858c9ffab9ba992dec06ed. 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/d8a5f73c-1691-48e6-b08d-1469f30cead3.json and https://artists.proofprofile.net/proofs/artist/d8a5f73c-1691-48e6-b08d-1469f30cead3.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 0xfdc0b226ff0059024d1434b681d3c6b0ea7c5db2e3dd1c3af6ab256f966d5c98. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:39:51Z), 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/QZHZ42133003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41681d038c89fb85ef2e68bf750823816111b1cf924f6d90fea0e2fa9f410b69. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTVM2146912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6880f42b97e87f726dd0978f790219155b9c3b9008f6a9d995169d79535181db. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJW2355890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93062d2580a86b86de2c13280afb7bc79edaa7abda28cb8e38445013700f0741. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNJZ2359489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd32fe7ee694c73a6d52a1e1fa0b98049e74f2657db415643975db0335055a7. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZZ972436074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01e0a204ae24a7629a962442778ffcda23752f47ac9fa846881fc537a5cec72. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIC2474846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4115c1c3e061fad4e98fa8c30bdc0f9531ab7059c7ee6d89bdd28b39b53ff52. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAIE2422881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a3a31d78d0d16d016ab0e33872febfa957a27d335f1b67f7b470fbbfcca8ca. 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/TCAIQ2402242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee279923b8ff114a0850782cd0ea4e680b86d840297fccbf9052367d0f725ce. 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/TCAIQ2441302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbecda94c099b881628f2d46bc0741f5d72565d42e2670bb791155598a1e465c. 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/TCAIT2459046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2294fca6be5d5eab658a5109f6779534764912b523092cac8aeb52f8f307e833. 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/TCAJA2414572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131d60e6bbe851907898ed1f580c4f9c2c0fe2ba8fb5b731d47f0f46253820cb. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:04:27Z), 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/TCAJH2558939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ce22e9025596ce5de044b2f63867eb989af0c508f60db157761c3eeb382db. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJO2530214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6866c774b517241a9563c6038393bb692f20004bf894a4ad2ebeaa95448946c2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJS2509274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6080bf0fd0729173e89efe220cb14187727223edb14539db8b5c805725b967c9. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:16:41Z), 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/QT6622542062.