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 0xa408762fbb263b2991640f5886c051210837b9deaae7e3679c3c1a1e28d6b8a0. 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/3e1e8c9e-a611-4e2b-8d54-fa360be6e1e5.json and https://artists.proofprofile.net/proofs/artist/3e1e8c9e-a611-4e2b-8d54-fa360be6e1e5.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 0xe9b9d9e821848141b15bafd02246e747cb1b8d5de31f6d6c2aa7602fa69728c2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADM1892079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b9d9e821848141b15bafd02246e747cb1b8d5de31f6d6c2aa7602fa69728c2. 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/TCADM1892079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba71ae0475fbc3132091c17f11b03d16025f6458bf29c836073d33456c0aa9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:49Z), 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/TCADO1883906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b983438f6469056f6a0a4d20168d1ab73822e9d613ba23d61fb905ace960c42. 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/TCADQ1883906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcef5fc2cf9f62600be409b3450cb791fda772ebeb13a1b6c5533d85529ff51b. 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/TCAFQ2190635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e19f324c4547aae3539ea78de2a5c90abe8ae25390be4d98a161307b71d9e7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRX202340051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf057bc48f10872bd5e442dafa8e01147c23a051351b0787152d1c57a772c41a2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRX282350035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf057bc48f10872bd5e442dafa8e01147c23a051351b0787152d1c57a772c41a2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRX282350035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55c8a891f061db9cf1ef51f37430b7378a53d2c48f29c3f851bbfb3d4e63881. 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/FRX282430381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea741ff3e8fc04f122f965a8bc97144b4327b6d17267e597b60ef0a8401c1016. 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/TCAFN2104863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aa165412bfafa145a7969d8206e72c46371e2e137c20e5a27310482b6fdb81. 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/TCAEM1966721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3751737011d8bcd03be958650604cfce4fe813313a5ea37ac6da5724e348c6b0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEUE21742009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e8b4318481ff2863009477f2f3e43dd4a5fb8721368a01bd031a93c9e29b80. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR2X42566083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a0ef4b3385597a295e014bb8bf32f59acd927b4a2d3c99cac9068aacd0a697. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PTES11805303.