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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a8c68486d35c3561548d4c87923d642933ec8f0780cabbbd566fee16a90837. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5adf4779-3985-464e-b88a-b6b579afa70b.json and https://artists.proofprofile.net/proofs/artist/5adf4779-3985-464e-b88a-b6b579afa70b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e970543b25deddec7104b6e9a3b36dff422715e7784963e955474fc42600c3. 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/GBBPW1900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160c3e91bfaba41c67b850433664475f0110552b34075dfc9e7f692a64e2818b. 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/GBBPW1900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c2f6b210a60c5545e8325594a9f185dfcf930be2ce1b8e78704bba5388a2a4. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/GBBPW1900162.
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 0xd7c9dac33a3866d919e1c99a977dd5aaf9f19fb591f4448b71997c44f206030b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBBPW1900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd24a091c9cbf3f7c83ea8a624cda416c1eb98ef26ba9ac1ca7821b8519891f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBBPW1900163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e22a92e71d3ae1e6d35070e535a7fa6baaebe9e214458c1cd0d028c2802a18c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBBPW1900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1957fbd565b4ffde0c7e8d02491e7f5265172454186ee094160f3de88cd3ab8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBBPW1900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33557707334784a322b5b752037de1efbf6be88bdc8b584dcb69902948516719. 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/GBBPW1900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2cf3164174fc79a16c03b9acac98e92de0928d8dc8f6f9f1bd792b41dc5560. 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/GBBPW0800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b72caead0b2aebcf78905845e3b4c969b8f1ab92a5021cdde96db3d0c7dc0. 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/GBBPW0800131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd76787f15d94d8aa6070e378276ac48504f09d16f3ba0060705586780a935. 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/GBBPW0800132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b488e305398314602cbff882880fb0b704685d1ffa471d6f5c8dafaddbaba7. 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/GBBPW0800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c85bec7a5450aa012d016411fbfdd554bf6e3f47b15dae84a09084e8769533. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBBPW0800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bcb2bdf202ca1fedd61bd6128c29a33f55f7d69b6cef992c99d0957c6692d6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBBPW0800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc674f8eefd1709d9e0555cf7daa390d482fce207b8bbba7f21361435192202. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBBPW0800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9c1f3f553961b282a235331731c13609716105ae8a434ec476118e929d1e14. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBBPW0800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d28bd2ec10e6cbc9cfdcaaaa460be8e13b838359372cc9c3cd9f843015389. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBPW0800134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d4e767501ef81feb5fc73fb30ce34c613e62e3c339a641acbcb7b8bbd6fd90. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBBPW0800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0401e16871dcdc65dcc9dbc719bcd0fe7968b39180a318cd02bebfc6f43b75. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBPW0800137.