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 0x0f4a3276056fa941811c04947c8960c71a871adea6410a3bc6e5ef26a6bacae6. 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/e4de58ba-beaa-45df-8212-debb5ab24ec4.json and https://artists.proofprofile.net/proofs/artist/e4de58ba-beaa-45df-8212-debb5ab24ec4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musik Treasures of Old Gdansk (17th -18th Century)
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 0xefc9d43c48ff1ab69eeb90107db187a406381132670013bd3d271132d5e75250. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLI369570350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc8fb9c35cb29d2cf89953d45ae2d723b6a3a86b05c3ff2046a446d88aca7f5. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/PLI369570340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa6141d035bb98194916813134b41098964c13ceff62486c0040f6cd464754f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLI369570360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10259a71fe184023c49eebc127b2348cfc833de0bbaf4b63287647d7584593b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/PLI369570370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5521ae8be3abcd4038a1333a819f8f3ebe8796ae00c64430f1402683934eb9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/PLI369570380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8f1be5eb4b8fc7f86febf023e5a6f0ce05ccc15097fe42e8f62038af11bbe1. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/PLI369570390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb768af13ec0ad650cb68b21281bd6f3e3836a99f1b9bfb5c2c540a2615217. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLI369570400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c765942f23ec390488e00c6b2a69b4376f217d488cbbd224e644921bd77a67. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLI369570410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f060fee15085219866bc2a0bd7081fd4d96f8732120d19beced1fac1d89f97. 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/PLI369570420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ad8d2c9ef8ab5fe4a6a36a4833b7d364f0b12f2f52d6464bbf89205d91692a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PLI369570430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507de21266b42f8bcf967f3fc204ea9982f884b40f3197cdb86f2a9fd68c61a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/PLI369570450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3272eed2b8369ee73cb3f8fca6bccd0da1ad39d27a8f4aea18535cc71b80655. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/PLI369570490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1adbcbc4f947590b740b821384f1ad1f06893756ede26634fd4a7d0df4ab93b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/PLI369570500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b56e78568e9259e66c61fef08541c033299dfcb496eefc7c323d9f113d30bb. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:54:00Z), 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/PLI369570510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d19ad6570c0685f9f3d01799e1938cc09f05a93f7125b8dde539359ea6a30b4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLI369570520.
Kolędy: Nowy Rok 1997 u Ojca Świętego Jana Pawła II (Remastered Version)
Skarby Muzyki Dawnego Gdańska XIV-XVII w. (Music Treasures of Old Gdańsk XIX-XVII. O Maria Rubens Rosa...)
The Music of the Kappelmeister of the Saint Mary's Church
The Four Seasons - Violin Concerto In F Minor, Rv 297, “Winter” II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c6a0aa904250ac47b34d78db4431eaee6f53f269e6984bd5ac90892ab0310a. 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/DEB790330124.