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 0x645f147a01a2632f973dd19c5332e51025d6d05a5be1b3aea78d4f70e257d37c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43dfc7db-12df-451f-b1e4-cbb7fb9317b0.json and https://artists.proofprofile.net/proofs/artist/43dfc7db-12df-451f-b1e4-cbb7fb9317b0.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 0xfbd7f0edef6d827be575af07c761b3de2547acaa05c6c7f75fa30778da699ad7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ782598180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f697c501987449ef7086012d8f881d7831207ab20a02af69a4d98550a029b1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZZ7K2544025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a70a346f8f4832a843ac0282fa11fdd6920eaa981c37266048d73992326df13. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7K2544026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ff1c5415b67fbfef679555dc870dfa157bb8951ab62a7c6de54b1b492750f6. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:31:16Z), 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/QZZ7K2544027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1733aad4ba0ce9f07cc69069f7eb7efe28f777882ffb754af429bd4346a8dec. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:32:29Z), 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/QZZ7K2544028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf15c882c14e9de32fcac14ee4a37c9daaceb4238468421a70e6e89a68291de9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7K2544029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2167bf809adc00dc0a4c54956f95922781b459047013ed07f459a121734116. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:11Z), 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/QZZ7Q2570286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb066276bca5f9b04aa9548d6cf054406b5edc5152d67bb3f4741db5f4427f336. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7V2527465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64ac26330bfeaa231bd9ea2b5c9519b2c155571a0dbd0591cf793d979b9877f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7V2527466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11807a2d4119639be838c9a90d9c2597fc26490cf1b56186a646a2fb74f79114. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7V2527468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc428c78d9131ba2d515cd8f822bec58c5559a09204f0ac0a96a0be72cf93b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ7V2527469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b59357f82679bb66265e2b3eb2b7dee2b6210c261826915707b8ea9e847ce5c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ7V2527470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4461d6d9b634256d832c8fbbe7e2ab01b9cdbd62284d373c34d9ba60747e5ce1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7V2527471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8761b8182bf66068c89271ba0b425c76eaeea375e396e5f54852d0ce405c8903. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F72565186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc07aaa729f765af497288029665dee9a92308789f454eaa9499ee8095b36478. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT3F72567322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f119b797a2d36c1245755981c0b0d37e4dd997ad128b6727943111e7944746. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F72567323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7084e6721fd7af4d6ea8261d3319730dee88f74d9b5e84c0d86a6548e288ab6e. 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/QT3F72567324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814cc0e96bc9455b31376678871537cb90300884100e5c90d29c72d7e192cbb6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F72567325.