thumb|Main facade of the Dominican Church in Lviv with the Latin phrase "Soli Deo honor et gloria". thumb|"Soli Deo gloria" inscripted in Norwegian cast-iron stove from the 19th century (S.D.G.) is
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 0x1581e17eecdc20e9c59308dfd26bc1f0cc87e9588cd1144bd6e4ae808e23b535. 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/c57bbbc9-2b5a-40cb-aa87-18670d1fa3c3.json and https://artists.proofprofile.net/proofs/artist/c57bbbc9-2b5a-40cb-aa87-18670d1fa3c3.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 0xebee11d24e2823cccf7c7fcb8e696660ee9e3725cfe929270fcd511a382f4d53. 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/NLL6R1700242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cdf11e4efb6f4dadc7efa85efe9dd6c376d98a92f410124e4f3c0a2c77b8fe. 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/NLL6R1700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d3a924a64393fd604b139b2ebabde79bc5cd87ee3b4c2773871ce6febfe59f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLL6R1700244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca61d3a0ee1bf9ef4c16346257aca29d67344cf85ab8e78714df01ded857e8bb. 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/NLL6R1700245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eea64ef44bccde1c61ced07a5d1990ee6bcdc81681ccc7c7ae3322a5931ba6b. 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/NLL6R1700246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aba6a00c760ca330f877e3fe1500fbca1f841fabbf2d67ac626639be4e50aaf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLL6R1700247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19e2d654b554bc0190b31c00e31e76832eafc6c2631707bfef6940a950c4b0d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLL6R1700248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c1e2941ee973821fe3bfe88b2239b4c2006c0fa15e226b53ad9422250683eb. 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/NLL6R1700249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e320b4e6d44a57792b311589d877c2e6fe4f08a52dabb871180e4896e5201. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:00:27Z), 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/NLL6R1700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24cc2f5888e11be8b66dbc09708acad31f877a38fe6856f07a1f472540895e8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLL6R1700251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303d0925e6f5463f351e11eb87e7ed8b0f8c13b26fd5a6681bec831e7a10c802. 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/NLL6R1700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7bf257c0a3c27a962263f900a202625ce65047f39e52613487372cafbf7f2. 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/NLL6R1700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa521d1ba7b576bc01a33dd298c036b9773da52082e9953edac245851b605c129. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLL6R1700255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c1eb37024eaa8f7cd279516500a8a39e99fd1390bac2927305c062eb7b3a93. 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/USX9P1068420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd911b184dee61dd8559e3b92044b5d86ff9eaf4ba6118605565477c8ee9162f2. 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/USX9P1068421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6968020643b8f6cb5fab25348e7dbe28eca9797fc48afebc17d68c76ced8dd6f. 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/USX9P1068422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73754fe8dc9f83620e06c29488360d8322e48758fed929a4f6bbbabe7c11f5b8. 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/USX9P1068423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed02522fd0aeb749d86a0be87c52e3b0b4873af92527315491cd02040816eff. 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/USX9P1068425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37d53082e563390add79aba51d836cc64e49a52d40eabc4ceb50f4fa1b54bdf. 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/USX9P1068426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01103d206ef99827817a975da8c249f418d215d1a24937f1e2431e9a4f083d0f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P1068427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1bb42b7b004fc9a8361531908f611690f754a79fca69e39a1ec0e0ed15ace6. 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/USX9P1068428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56ce800c8e17c32272953b4624584bf99c3a9546eee8b2ea4a86c3a4ec1cc9. 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/USX9P1068431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1814a35a31de0cd5d4d0b1b90bf6fe925cd92f4e40479f0b4d1d489b7f63d3ba. 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/USX9P1068434.