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 0xc0fd6984695af2f90ca337cad4bae9a98459510bab38c35713df011fe40afb78. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa8d6a91-9fb5-4e8b-8d79-9c69f21433f5.json and https://artists.proofprofile.net/proofs/artist/aa8d6a91-9fb5-4e8b-8d79-9c69f21433f5.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 0xb0dd750854b6d9ff5c4274ec93c6093fc4918d7a33767769f516d918c3913d59. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:14:16Z), 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/QT6EG2568602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bce75ef82a628319be4dd8b703a74da6b4bf9329ce55dd12a1e2c2d4932b47. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT6EG2568600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6701ff18f5af278ec6c733cb8558b0c986098ff9ee835eee243c72e0946ddcf. 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/QZDA62350552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633510382bee6922ebede9b4172a305c33c2d85bd71589554ce3e38d7653d323. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F82506518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e6bdbb70bf956f88c60c4e4c74d77712568cb22aabc8b8bc7f7270251685fe. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFE2325893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef6254d54e0be0bb7343ed4685c60b29a02a0e8cb1d4324aafd0f2e208bf5d1. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:59Z), 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/QZTBD2475713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0727dd4b9ec18af6ab54bc443f57a03a3f5fa14c1fe367c85ad153a98618da37. 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/QZK6L2511598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15af6b5db43cd4904f34430a47d7e8e0b76cd0d412aacb51af2ed83466b3c64. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFS2529591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8689816319d75965c0f9feaac168faa832c90e98036106a061fccdf4c05e39. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFE2513845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374b4e784f62125a4e017091ee66a9e4ba11b23fb900be8f8122f60a6c04f2c3. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZWFV2559219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd042f08c739cf002cc5c7cdc3ef7ce9f073742583cdd9f99cf7845caa99e90cb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFS2510402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77fe0e5a1620bf243a2b0eb07721dc99c52c8c11e668f55c3a520e933bb7458. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:08Z), 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/QZWFV2534804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a6a5e78f857f529a5d0d6ad5995237655c9c52bc1ca9a710a7bb9b450472a0. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:10:05Z), 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/QZWFX2534295.