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 0x100381abce89139c25975b50cd9d42cd2d25f1d940c3c79af9b87199e00f082b. 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/c6906c0f-50d8-430e-a010-4b2212e0add1.json and https://artists.proofprofile.net/proofs/artist/c6906c0f-50d8-430e-a010-4b2212e0add1.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 0xc196bbd2db0cc7beea1203ad9c2e50364d4bc1e1a2cd194f6e2b4657eeb4af77. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKR6V2117062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdad57f42c8d745371c07ff51996f191c58567f6b6b7b15e0e2a8d5145243f6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKR6V2117150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6849f1fdae077e6f367ead6bc883b9c05e3fa6052f7d126bb101691b3a241d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKR6V2117151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a3c2bd6befe0c8a067e749ce72fbae21be91ba372310d9d730b25d3af22cc2. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/UKR6V2117152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94a828427128197b9346c01a7c265751c6919d7158a2c8772c77ca6a4cf9137. 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/UKR6V2212033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c40b9fcd54e34ad7d5c081a0622d0bcc40888e4ebfbb3b43cba40fd8cd2903. 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/UKR6V2212034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48d2f40c33558dfc000f0362fcc3505145ac8b5a7961e496a2f551d3af88faf. 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/UKR6V2212037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238b0b4c87c47b4b46b97635e8b1898df5c02002f731b5bb4d9b3fff42264569. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/UKR6V2212665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5f1b36db8107acf307e727f06a226986fb970ba69623dc56c431deff27450b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UKR6V2212670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fda1eead824b9744c4344b9148a3b3139e817a1b007573c12b5d83fde2c5471. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/UKR6V2310188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba26b29144dd0d5fbc516f00eda5b42cfced4ec13bae14eaf254ab953d9230. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKR6V2310189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab8f5234dd8b6a54cc2707dd2ef4e9dd7b631b2cfa2096942dbf5c1c25d627d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UKR6V2310190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaddac676a215c88fa49b8c25e15e77ffc4d1e28864dbfde51a062474e125b9. 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/UKR6V2310191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ab0b713bebb154f7713ddafef33a5d57dbbb53d8529872d78378beaf9bca4b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKR6V2310192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ee4156648e998a6706c8d91f3c07e2d05da1efaf1a2ca6a47776d9ac78d68e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/AUKDT2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a497ccf537c35f662dc9900d5748aa9d09ba34b567e3d2881b5ff8eeefe54cd. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/AUKDT2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01809066a8ef790b6aad1bfa784b8f02b80ee408ecbff4e4b6724f07cde5b19. 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/AUKDT2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ff35053c9ad12f60fc5c52a01fd433a4ee5ce85a628a93ae5799aa5121eb88. 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/AUKDT2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f1977058f9d218181a22b73c9fb030499ea962f34e5d1e29f14ce4e1192129. 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/AUKDT2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909603dcee87e0529c77a1a5911f4a18aea55542c6625fa15f2a23c8788473a9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/UKR6V2212664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37babb9607381ad25654bc43d431c5d6523b19ea530deae5b554deb3f8ace397. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUKDT2401230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8123f56cf366d0af203b59ca0f12c54f9805679008d27f1e49613fb70488063d. 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/UKR6V2116514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1b572f11aa2308b7aca6ead4bfa2aae3ca56004814ac803488bd4b8ea15772. 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/UKR6V2210201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5f1b36db8107acf307e727f06a226986fb970ba69623dc56c431deff27450b. 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/UKR6V2212670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aae42fae7c033a075a5f0cca7d3c2b05151b3c23d0da841ad9a6001cfa5310c. 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/UKR6V2213541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6844460c4b3eb42aa9e3c3274657d63aae7ac11c1264536e48829f410fbf3b0d. 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/UKR6V2116513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd137e48eac3f4fcb31a7926a47a507732d53a67c3307e901707d8dea802ced1c. 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/UKR6V2213134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01809066a8ef790b6aad1bfa784b8f02b80ee408ecbff4e4b6724f07cde5b19. 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/AUKDT2300030.