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 0xa9d8a54e0bc8252090cbacad4aacd36d3fc688c3643b5a03b26eab999d25e346. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1e399d6-0b9b-404e-9cf2-a9a0f04bf731.json and https://artists.proofprofile.net/proofs/artist/e1e399d6-0b9b-404e-9cf2-a9a0f04bf731.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 0xad757966522fb796c539da48649e818ce0c9fe5971f3d5f6d9539e4f639f6ec8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USZXT2351740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9302363c1d8626042731be14ad9e97e0f10c13306baa56d8a9b5780650aacc36. 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/USZXT2352057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa544dc0a106aa6ae353feb8458d85eec06c90f8c873472520f8cbe26823d5031. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USZXT2352283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac7d58962649b46083e90cfa8dfd726ce1a131de6b458439f355ec589640917. 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/USZXT2352284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a212db9872dcceb14cc2ba95ecda62ffc96b9ad1a0d4d3d9542557e9533d016. 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/USZXT2352286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac7d58962649b46083e90cfa8dfd726ce1a131de6b458439f355ec589640917. 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/USZXT2352284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9302363c1d8626042731be14ad9e97e0f10c13306baa56d8a9b5780650aacc36. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USZXT2352057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9302363c1d8626042731be14ad9e97e0f10c13306baa56d8a9b5780650aacc36. 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/USZXT2352057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc055db649e3f43beb80215938e4499cc21c29d32365978c7d85415327bb19665. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USUS12100353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc9a422ae204fd86124cb132fc7e15a93d625534e9739bba9a017fd873b1132. 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/FR2X41531393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6797cec37c8055c6019aad14d1839fe6a91334e970c50e741a3d4a69409916. 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/GBCLQ1900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b69186212fed906c3678978197343fa3984a1e24062973d02efe5b522f15cf5. 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/GBCLQ1900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed9157dbdf4269a7f1dccaf0f5a6dac73772a2dc9a0beb7230c09108bf7d3b9. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBCLQ1900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8258ec6d485a5d77381ad5a12dcba7ded61c5b37d61f48a3f3c83300611a34. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBCLQ1900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9623358a5277493ca69a428cf4e4fac95b29a824f91acf3f46c97c8d76d911f7. 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/GBCLQ1900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1497cb3232208320a405de54f5eca3ebb26c23cbbfa2a4a816b0fa0a3da03faf. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBCLQ1900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2664399aa830cdd924231e07f14695de77fae1b80a6599910f1c445ba29019ec. 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/GBCLQ1900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba27fee02c874dd14b23eebfeaab2dbe3a8ba905f893ddc50b7a2121ed189bac. 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/GBCLQ1900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee78b4bf4a06a4d4fa1fc3619d28aa54fbedea875bcb2571f8dc196683b3c83. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBCLQ1900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07f1ca3b7d2b24da8299a0a8302bfbc85582fb22afb126fd3a45dd3bbe848d2. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBCLQ1900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc9a422ae204fd86124cb132fc7e15a93d625534e9739bba9a017fd873b1132. 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/FR2X41531393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63717df47784789414849988049c486b09b3fcccbd90d74fc3bcb868361ded8d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBCLQ1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b69186212fed906c3678978197343fa3984a1e24062973d02efe5b522f15cf5. 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/GBCLQ1900141.