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 0xa0a79cdfe0cd5888652016f919936d3cdf589f721b61ffb9fb78a2f7ad623ec9. 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/bb919745-1cff-4033-9197-902f1a31d68f.json and https://artists.proofprofile.net/proofs/artist/bb919745-1cff-4033-9197-902f1a31d68f.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 0x3dca639844e1f33414f1446a7edda2dab0f9d7457bcedfac96c1e3455e19ec67. 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/ZAA3C1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4270a4ba72c9bf800c3740256a0ad7d3d0a999dfcc9a7f7a4f1b6b7ca65c7072. 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/ZA8M81600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1304428d20200facc80008e6d8aec3eaf10cd81c60083918e91667096e34bc0c. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/ZA8M81600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9e36a0b0441c774c66d6791bfab9d272aee425c38eb15aaa2e0d293f9ad81c. 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/ZA8M81600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fd475c7546a04e2837139adc3b240c03c5f5edb2bb2abfbf86c5c37c807f94. 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/ZA8M81600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c4e0518e5f31ab82ec35e2831a9a8483fe819b35dca4172a45207e490b4688. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAW781500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd81daaebb85a9e5191fd7e991f935ed018c8ba12781a2ea2c56ae4daab2479. 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/ZA8M81600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27842377a849c3461507c817b829a099b5c679159ea99f0624a9f8a5cda50dfc. 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/ZA8O01500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c59b564f534b0de85ec064e7654578d89972fe54986cde6ded83e2b454b82d. 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/ZA8M81900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc02f56de13fa3c4455b8ecb8488d2a995194c5e7a962f35029a3204749773d. 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/ZA8M81900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4270a4ba72c9bf800c3740256a0ad7d3d0a999dfcc9a7f7a4f1b6b7ca65c7072. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZA8M81600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c4e0518e5f31ab82ec35e2831a9a8483fe819b35dca4172a45207e490b4688. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAW781500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b35dc772d939d113fcae037aa1bbe3a8d31f56219fb5d113a450227336abfd. 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/ZAZ012100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4270a4ba72c9bf800c3740256a0ad7d3d0a999dfcc9a7f7a4f1b6b7ca65c7072. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:45:32Z), 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/ZA8M81600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b8962ebe4ec5ec2f610e2a0144ae453fd1677a808f082f4e6c58e8d27ecbe9. 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/ZAR7A2300006.