thumb|Mountain lakes of Czarny Staw pod Rysami and Morskie Oko seen from Rysy. Rysy (; ; , ) is a mountain in the crest of the High Tatras, eastern part of the Tatra Mountains, lying on the border bet
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 0x2b4134a678cceca0a7f8995541376fe8fe5430c2c060ac1567f6d3f3c5452dfe. 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/346f3ba2-c73f-4905-9641-51b2b8f7b58d.json and https://artists.proofprofile.net/proofs/artist/346f3ba2-c73f-4905-9641-51b2b8f7b58d.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 0x822dae06c20a6b05d7b9d52cddccbe4af4b03a5945404fd95bf17c7d750926d5. 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/PLI861300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891426e518cffc53c6f3ce8ba339bdd13718a4060fdce1443fb5143ddf91ea43. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLI861300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47ad55876579ed2192c9d02d40d9f1f37162d5c189d08ba167b9942c8bb298d. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/PLI861300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cc45b6be35ae8aab5ed70bfd384f849318113205cebfba2423b02e73a57eb8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLI861300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1871d02a1fce0b18a33ac174a05043da20d0ab18ef51ce14e6233844028cf96. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/PLI861300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a7b1d18c7d3046ca33dfb7bca03a318cd62baac39bd11aa04eb9752bc29837. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/PLI861600158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd8bbbf05504417c391ec3ba89291b7a0b2e781f3bb263c00490a5dee8e6ba9. 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/PLI861600159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285bce1e9b92b3caa3f67940e2f2842e3db62b4ddf3450ba8239b42712a670d1. 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/PLI365720860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7073781001cbe7327838fc199603ab9409a1206bdc28b85d9b56c5cc668bd31e. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/PLI364459410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e277c08bb843c1c53be244b17e6e4258b25d2fb3929a8c44c6c6eca90853576. 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/PL06N2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd8c47ab675b6012f05bc049734a5f332013daa4a7817730478a2485b6899dc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/PL06N2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beb2eab20f7fa17465c3aeece78f4c60a6f4d9a2be690a1f23a61f1c7abfb28. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/PL06N2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931714dbca6dd0ca32583ded62c486147ec87683a4389ae9ba9607ea6d445d37. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/PL06N2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e403b05c7f3d75732b108d780f8ea86cadfd9e72ca7c025fb518dae0c68a8b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PL06N2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1c8f7eb7ee9b53c0ba15fcb08c60de8b6b73c183798ed7a9a8ba36721d0873. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/PL06N2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ca3446a67c4534b936c4c10830dc3cdcc85294934df3cc5a8405d364126ad3. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/PL06N2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ae1e853a3be57742247ecde28cdb44160dd64e732fd556c4b913dcda540141. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/PL06N2300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a95cf36eee9581346e7ec5c8755dd5103096073bbde73ea731c21c8afa9331. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/PL06N2300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378db0e16b37194e36fd6b316f7bc6fdec58e3030261c0c078bf210f338f2af0. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/PL06N2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4c3a6dac8763402361e7c360bdd7fe87063c813dcdf8e47aff982800de0078. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PL06N2400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5cafe62ae5711a7b1f0fa1c03cf13486d780f1e88ac6a8631ba4621ff4481d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/PL2DY2400896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7c1792f006223dba6db17aea33278b8797aac4dbb973e9971d4c4f7eb76f3a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/PL06N2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7b8b5a15774b0940fa0dbb943351c14dc9f1251d27485b199ce438da9259b7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PL06N2400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19f9e2d99fc6a014a7a81310a9a06978423999948cff4dad28208c44da8de44. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/PL06N2400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5cafe62ae5711a7b1f0fa1c03cf13486d780f1e88ac6a8631ba4621ff4481d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/PL2DY2400896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fe65a5291d933afcfee9dc7d8d1cb8e4874badc51fc10958548f21b9d10831. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PL06N2400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d0dce3c7f6287bda9c03a164064ad130fc135870d4254453ef04946b544b2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLUM72200160.