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 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 0xaf44e196d47eaa686a8223c7538452a7d91c74878206b5fdae7f71a46b3fe75d. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a919593b-ef73-49d9-ab31-f1261c1ee69c.json and https://artists.proofprofile.net/proofs/artist/a919593b-ef73-49d9-ab31-f1261c1ee69c.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 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 0x2b4a447589c07e601a5c5f6ef3fd1d83dd78feef0ebd57ccf11f12b8f703e3ce. 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/CZA161100624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0daa8a619ea419cbd65840bbc06e11d4fdf57b1ec50fb1fcd60ece7c75b993. 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/CZA161540408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7ccf8f50d212cb0c9cdf5de01c845d437f856e323b6952b0375eef6b51920b. 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/CZA161540409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8455ccb29058947d92d9ea98a22eaa3efdf59987090cf4dbf2e50399a84ede7. 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/CZA161540410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a5fe77c50d80621315368755eb7e9b571dfd5bedc7cc9e0ea7b69d54d5516c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA161540411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be9277fa7de9e3d559615dd5187ebe606aff22a02b0b995229cdbda50c67b42. 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/CZA161540412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b2a2dc6d72fe3e0a82624f9545379e12335306c17accc8d4c0129701588bf4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZA161540413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0723592653f6c0a65deb33fcf03696d365c7e3c5615487916cee45a122ca0967. 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/CZA161540414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26239a915a7f3f42f9b7ec9fff293d08fb63f36957c933908d4b01cf81518452. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CZA161540415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3252f60418bb3392406520d61a34cf3c66c0bcf78cf4173a1d5d85d5fd543f9c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CZA161540416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf950a2090facbff1af4a3fd659d02d51f43e22928a3aae90880f3eac7e124349. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA161540417.
Žabí Muži Zasahují - Návštěvníci Se Brodí Bahnem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57477f685ad6949769fae888e85d5a82100f928eadee2f1b5dec150b410f860. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CZA161540418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae50a7edf6e1fda7a0f1b6afb4b289093e4e1342ad7571e82b416a282c5985a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA161540419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be1ff81f24fa15a8f7dbe068c9533ff4a74bab8881ee2410acf2578df046d7d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZA161540420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567d0b445c6c6085a603503bf92ab98e8bcf2599610a07fca93b68e42ec78282. 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/CZA161540421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb8155c65672ffa5120a8320188be5b3b2e4680c284bb810d9b8eb2302d0d8a. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/CZA161540422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fa9c58b1413ef5ebc85b77e3debacc8c8dffa46582a71f6080ce608ca9836c. 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/CZA161100625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb603ef64f9f54b61d6b3a4eef24b40f13faa4e48660658e345ced0c030d731. 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/CZA161540423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea401c6311c78625d7f6ed6dad501894ef45881704e7ff284d83d8450b6660a. 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/CZA161540424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec27f5b67d61db80c6ce80228ea2a648364c02ca4b2b9ba47a9b752cbc12dbf5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CZA161540425.