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 0x75749cc68f35f2c6c9c3e905ddff54002b7d9ae0ea4e356fdc8b3f5b4a77fecc. 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/9b3dcf21-c3db-4323-a736-cbea3f713fa1.json and https://artists.proofprofile.net/proofs/artist/9b3dcf21-c3db-4323-a736-cbea3f713fa1.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 0x933250db8767263901ca265683d4c4dcefe6f8d98171fb97eb9f3508a1bfbb4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HKG732214977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a33d93ae1592e1860df969881135b9b856ca971c503f2d82881b1cbcd4e879. 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/HKG732312354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf295e523c4b56f3a0aa7534a64dab33281417af60b6b4a90294811bcff259b4. 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/HKG732312356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581f207deac84cc27d42ac564dbd61b64272ed9f178dffa57376dc5f073710ed. 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/HKG732312357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f7eb08196b113f821cb0e0b5aee1544e777c1d8993b55886a2790f6b327726. 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/HKG732312358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b255752652fd3a3a4cc3d250230c8e9d3678b722ab74d15f204545064dd3164. 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/CNUM72400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88908250918f091a357c95ed7772f9d0650fdc5575fa456bf63574d56c5e2098. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CNUM72400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32b1f27a5c82018504b47baeedaf603fab8242fc793c2c7e852dff97774d386. 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/CNUM72400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277b4a1b7a01dc501f011f37f074b1a0a981b4daa317a7965e5c2101b14e02bf. 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/CNUM72400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefeb0b0c48ea959d237de3fbfb20d6b18ba4878c84b903bca42e90d48ba6d31. 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/CNUM72400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482047177b5df3e92e32e42ecbafa391e38ca7425eed907d04fc80ed56d9a40c. 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/CNUM72400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4520595548e0ea6097a9b8d6685abf6a302db5f7c0f3a45ea0ab8497164f8d76. 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/CNUM72400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c57b2abf7558f21b7e2800dadc37d264965dc9ffc19a091d83ecc3fc444d4c. 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/CNUM72400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a5ce245ed602c6d8c46e72d7627626eef723c424594f568f64719188194e65. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/HKC992324804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b48834f94ae195e2ed1fa3d3c7a5cfe3285a63d148fb586852b9f4ac62a8b1b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CH6542510840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060011eaefa8ad870fe77c5e5b84fe209c88ecd97b22fb38c4304d370e016339. 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/HKE022258061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc771462ba99dd8d183311ecdd8f971dbd224712d03e7e6badfad94d3ecf246. 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/HKG732495349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fbc753c7ee079e7e1cba804d1d36dfc92b6f8dc86a7ebf2bfd1dd8d43de10b. 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/SE6SA2486179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8950ddf4fd581ee916604c8b49e16ddaca5543dacc8d1d2f5dcf618cdfa9a11d. 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/SE6SA2486180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eef0da8cf491c9964b8cb21daf3d72fd9e8acd3729a4afb1b91d1ae96ecce41. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/HKG732327441.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch