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 0xc26bfb1f96f35d26ccdbd3ed99b92749cea5759829a18df5290beecda3660bb0. 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/4dd6b880-5ee5-4a98-9965-e23900e88bd4.json and https://artists.proofprofile.net/proofs/artist/4dd6b880-5ee5-4a98-9965-e23900e88bd4.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 0xc75e144573fd2605553e0ef1cae179ef0fa489ea05926312c9999cc5d1785c45. 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/ZA56E2305475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d710668414480e62c71869c473962823f8e48ef16c244ee2ce7f00517e55e. 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/ESA012232927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05e3554ebfd20bde7b63f997b87d018ae5a3c927df338fd99ec21fff06f0462. 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/ZA56E2421602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ec3490e836c06de9aeacdee599fa16d612cb21c22605a1f7292c2c805525ed. 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/ZA56E2305966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0e289fc44b8d436687b71e0509a95d62da372e9d241740c4f134ef094ae0e1. 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/ZA56E2305965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75e144573fd2605553e0ef1cae179ef0fa489ea05926312c9999cc5d1785c45. 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/ZA56E2305475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ec3490e836c06de9aeacdee599fa16d612cb21c22605a1f7292c2c805525ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA56E2305966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4a9d63b6a7b7593a2def6fb5515e19b92effd0024171f67da2882dbe2029af. 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/ZA56E2305967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e171da5db58c5b734c952b9035cd19c28ad85024a15b9a88c9f9ab432fe0f1e. 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/ZA56E2305968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3724e7c2979660123f33e927ec0a0eb462a3a3b4fc1636feb56b739118a948f. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ZA56E2305161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8098c1166e9ee7e1eeba3396f26de4e1c8c4dcb65946083ca692429e846a30b1. 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/SGB502485441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3724e7c2979660123f33e927ec0a0eb462a3a3b4fc1636feb56b739118a948f. 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/ZA56E2305161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e1de51961d94d6182536ce79aa289c276deef9cb7fe4a3f2ed21c9633a2542. 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/ZA56E2305089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6a7c92607126a6fb12ad09cc071ea199bd07e5f160689900fce6746c14540b. 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/QZNJW2105754.