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 0x9d20b9667d4f7252c908395177aa9c85f0623cbb5edc64d7db53f43b5547bfa8. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e2d4b9e-5c58-4fe3-9a3f-dd6bb4e36d94.json and https://artists.proofprofile.net/proofs/artist/0e2d4b9e-5c58-4fe3-9a3f-dd6bb4e36d94.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 0x2fedf625ff95b1fd4bd2881f64e5ef0ff5786dc2de30830c7caae297536f1346. 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/HKD012311221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efed05ba37ff147b99c767fc5e9bc464678d402081a033d8ba00587e5628a4a. 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/HKG732280526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07ba72284afe97ce69c35682ca2f3639ca44f5c1d1dea20c6b944059161b988. 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/HKG732280527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3910fe650237c12863c825194b3abbee43a5e1ec8dbfea81d94ffee0506f8d. 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/HKG732280531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f56e9cb431e5a57c4c7374fc1b2862a08c4148e52a90fc100b4f0e3afb7ac68. 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/HKG732280533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5077f5eefba67fbff64091d5904e30dafd308798017eba98241898ee3f4e52. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/HKG732280530.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba1419bc3b480f6590340f633c1b6a7fc68b2cc40b97854654ae88c7d914305. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/HKG732280532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebef0b73d3026a376fcb6faa10cc15a99b533e328b170d07d53634029289723b. 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/HKG732280544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd108751558e79b4c92c3fb61f309854b12b013826e1b48915ceef854267aa. 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/HKG732280545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056ae6ee58647e47224c78750336eb0f8f0b5a550c56e1161175bbad7afd3da8. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/HKG732280547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af5724b5c86a023b0341563c2a90d9e923319a519c587663030754d58076662. 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/HKG732280548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab01f9b85342148f36997c651d442cbea95601e4bb32b6fa1675bc5467de32c5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKG732280551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895154ee58f42180a39333a5ae46f03b98ece44bd8beba2eb05639a82e55fe44. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKG732280549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a108d756588f86e1643fac9ff356fd16aaa2c26938c6a2ca031c1a85b3250d. 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/HKG732280520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf713b78315d882b5011f3fdaecc8dd94c0b3cc38466d4131d84d1dc3e8d769b2. 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/HKG732280522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84095a34c36b00aec2b9d042ec48c3920d3e02f48bb69db03a280705adbce6. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/HKG732280521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56794674aa1e129b53b614b126fefb6b462244a08f34f6b0752edc68548ce07. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HKG732280525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8791dd7dea7f6aba6f6bc5580988b6474464aa5f89da4bbc0a645355a733a09. 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/HKG732280511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dd34ac66bdf1905589117fa1891f66311127fedac65ccc36461c5371ec52f2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKG732280512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a7a385835958e8dd6ced1e0bb03b7f356d43827488d2508a8dc79044742efb. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HKG732280513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7794d17dfba9f05d87a5cd9ada0f662765a432ff92c8771de3e3bb62654d1082. 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/HKG732280514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcad6563e59a7ed445f0352598f3a4547424e0c3f34b232e53209ad44b3850e. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/HKG732280518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc08d28af1da7e7c919ce89105aeffe018e3faefa1f0257c5c80e6d25c8dfaf. 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/FRX762225408.