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 0x4491e7d5acd42380a58a941fe1b121d0cdb0e6e531a136bb5918951683979d48. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8193cba-1baf-460f-b57f-5e9a6bd45648.json and https://artists.proofprofile.net/proofs/artist/d8193cba-1baf-460f-b57f-5e9a6bd45648.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 0x47be1f531347921552143c59d719d368f4511141c9c577059d2a3fe7f910c981. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBSMU4455996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512509a2e364e1310f8bdb1f2d9818ff3eb06492769cfca0e8e85668891b5b03. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:13Z), 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/GBSMU4455997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d724f34bb04bbd307fae6efb2e90384b8f1eb363e46f1c2b356c1d435330286. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:07:43Z), 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/GBSMU4455998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ae8ff2ed44e0289a5f3cec849d975be919923e73f7d1e879b9c537d521a14d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBSMU4455999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa686d19764a365556d8dfddefa706f09cde035cd6a2290fbe7daa0432327a64a. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GBSMU4456000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f7510a3fe9ecfac7b04bfd948c7a8403c2f18e799cb11f9321bf56a0a56dad. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GBSMU4456001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954acabc23e23b872dc213827b20e2e26fb446659189cdef09eb05688ed4b532. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:24:36Z), 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/GBSMU4494156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9850e7701a43dee0fff1911591b626216c8b45a67c22b2bff627ae70d3f0a5e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:51:02Z), 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/GBSMU4456043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9284e335de6ec67bcb4af37556acac6f6d004cc8aaad32d742144ebcd0804a8. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBSMU4456044.