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 0xd533e6a87ba48273413c45add588203627e8f7b817d75756ff58e42b0258655f. 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/677c9de0-b5d2-4f2d-8b11-46557cf470e5.json and https://artists.proofprofile.net/proofs/artist/677c9de0-b5d2-4f2d-8b11-46557cf470e5.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 0xb1c3877720be087100974f3a24d011475923940e231c834ce6b291184e1bc7cc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NL4NL2204529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5d5a508d4752e4719a59bf73b2a2fdf897a88c714a605033649f84a2084946. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFZ72366793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f125405adf52535770c92fffd8e1a9138f90e843aae80458998d2fb2277964c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAX2378053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b15d86d1cc754bf8a40ef4226c0dfdc0161661cd657107bcd19a0fbb5b8f93. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES92480377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a28415aba6de3350c244da68c1a3f0290b9617ca1eaa9096d6e472401f10975. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES92480378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8da91dc4e27b14f7c37cf6a6bfb61f10ec283afb783eca5c7e26ac1bdeda7db. 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/QZRP42417378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b432acb39074ffd329ad2b7f47f53510eeecbfaa670948ae39febceb0bb841c. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZRP42417379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728153f4d082103758c27c5dd248e6db392db3d0aed35f06be19d85b016b314d. 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/QZRP42417380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c14c1b188548f66e8a4f14cf655825c9e0e91c8df5b00a814ae6c0cd97574b0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZRP42417383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e37ff72b0fe426a276aacc13292d7dd736247a0e3542633937a9c96def9c66. 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/QZWFX2464294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c64f63ade7de64c9dfcfe03ab43fdccd2a821adfb0dfce1c570e1ae7b8fd58. 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/QZWFT2512921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83505b6b303880257f9a797fd8498cc9959a1ad7f854f27ba77ae7d2959938ef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3F62579536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420e49a2ab54f4309bbaa9279e8c256ad1aa26997da00175694eb918934b0811. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:56:59Z), 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/QT3F62579538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deded844fbe471c55871dd87a0c9a425835abafa5034819abd028283a6f6615. 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/QT3F62579539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a439e47745a66c2bd77aae8b9780ec342482953bfe5e7916ff3de22bc733309. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:37:17Z), 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/QT3F62579540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a3d56f434eca72533d586845eddc4c3fdf7b8479db42e7bb0cdf4e351fc144. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12467344.