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 0x8affeb76185087fd80ac7fa7681f0aea94e7e980ece634eb97489380902e4ac0. 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/e815e3ae-01a2-4f52-b39e-04d8ea17c3cf.json and https://artists.proofprofile.net/proofs/artist/e815e3ae-01a2-4f52-b39e-04d8ea17c3cf.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 0x697ae4a410790c2ec73dedf47f01471ff6649fd560f95be6d0f8e9044a90ba0b. 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/DEZC62434619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa853b4fb0562589e2a4f6c7d5a08e3cf068bc888e9cc81159cfa900dc57cfa09. 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/DEWM92200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b31d6ff1420b6123173dda07ec5373895c12f7fb32eb733bbc2ce6f5e9f23d5. 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/DEWM92000522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f31ba005d569678af33000cf136420153ff3b0451a425c55a438fb8ba4b163. 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/DERI31400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1cd5f60fd5697733ea14f32783ee2e3421cdcf579175ba5d59afa50925f0c8. 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/DGA092300661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd37c4b33304e34e75aa6fa3ceb974a2549f63ebb128502613381f11e80cffa. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEPI82210649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955b3bf14e2b3d3c0672b7a581d50faba54e3e887a1db1b30f7190570635763f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CA5KR0012720.
Kontor Sports 2022.02 - 130 BPM Workout Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdca16d613c8fb482737f1b07c352e5c7b3a96799064d06d7ac8dc2f5c467e8d. 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/DEN062200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73f83d1d04705113aaca9c701495f0f40837d4c0e4c5a3d14a56b27a91e854d. 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/QZTAZ2411893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f6c3a02d0646ee128988a86c7590bf005205337972ed5bac3544ac6e37c75. 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/FRX202454250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f87559c847003d064db1cb62b7993733fef2322e3f702919029fa920bbf2a63. 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/DEPI82404856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17202cf89addb2bb1aaf4a7abe1009ee968c43f084cd37ade37d34ddd1457f62. 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/QZWFG2352769.
Kontor Sports - Nonstop Powermix, 2021.02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866668b6553dac1b7da02f22f373907bbd44ccf1e8965861c110b19fca00789b. 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/DEN062100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb092a6c0ada5f2d14a8520b479f3aaaa928d20fc3cf02972fe2a705a7169c743. 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/NL9KQ2390413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5850cd5276e87ad24a28df7e171625ed3eaa3c02f2cb0046558f7c8f0559bba2. 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/NL1DT2200002.