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 0x34d29a581fa66ee1b9416ec60697a49353eac368263b6e2cff501a7771c5cd8c. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ca5465a-c70b-400e-aedd-89e652844ba7.json and https://artists.proofprofile.net/proofs/artist/1ca5465a-c70b-400e-aedd-89e652844ba7.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 0xbd9939755b749df3576d00a82d774c7cbf0436ffb1362adc22d89ea8d97a64ed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAX2464160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a92f6a3e924e9ba548f0dd308bdc7421cf520648d4bde0eccff4ac93ee0da2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAX2464161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3508aeed77acfa391183f9b0c9b83e4031a77823f16aa1104374e2691387e5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAX2464162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd82210dfa9266318be48e50904498c2306738167f64ae7c1b0c90e5bd860aa2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAX2464163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d950055eaf05aaba2664d4a6c4f488a559dfda4e0fe1ef75a8facfcc214231. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAX2464164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a04639dc5c206269ec38933580b9767c4ca9a525757b312fde4e899d679ed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAX2464165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06195e14d6ea5213c83daac4d4e8377f955600d217ec7386215e165f219dadfb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAX2464166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb180ebf7f52341f262b479a863e9e6c11795b979dbf7a408de3d710824b666. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTAX2464167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde8a965e2ec87af1acff28184ca804694c8b7ffcfcfa96789689c4c02f684ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAX2464168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264c3c364f3e831af00755a970183ef4ea2e3290142782cd26d146849b1d2d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAX2464169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b602c3d08f8790c2a4bac1986330509806d41ed9467391a24962694cc7d5205. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZK6K2311675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d33379257b07583631f00c44f27e41c73f7396278de6fec54e523193ee5dc2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6K2311666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2084ba26abf5825a491a9b37e64029990438aadb283b9f188bfd7e79bb8cd1bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6K2311668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446f5a1c3d42c82702a61e780d1a758b2e00fb26b137f627632968d4203f8359. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6K2311669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c27d444f3e8c24549991bf55a924805b56c880290900f4c24d4c00d4c743332. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6K2311670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd0c6fa118c5e0f9053b05cdd8d6372495c5d819b1eafa53ff0287cc6008a81. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6K2311671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6fe1adb474dc00f7977f1b0600e417605cbcdd838e2bf724d900b1af1c55f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6K2311674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b602c3d08f8790c2a4bac1986330509806d41ed9467391a24962694cc7d5205. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6K2311675.