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 0x37a61d63f767742176547d79f819838823ef3407a1f958a84fbf0e6eca921892. 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/931bf7fe-e8a3-4340-9277-6c7684d07dba.json and https://artists.proofprofile.net/proofs/artist/931bf7fe-e8a3-4340-9277-6c7684d07dba.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 0x46b8b2bfac7ded8ad976e79a794aa218aa34d6f3cd9bdeeefb10f641c5a27cca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZES71914058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ca95b5540dda63d2ecba2a2048bd6e5d1d54944c73b43a92bf5f740ee997fa. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:22:42Z), 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/QZHN32149732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae366f530e635ee42cc52e7e739d4f007db4c58eb83649fa498bc7a5b074f23. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN32149733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f00af5c9a11413d36a18bf7ea6f82817b74cd359c810a31acfb0c5706118ea3. 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/QZHN32149734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1d7264052c6e6e99239a747e05876362a221357dadf711bcdc6b1deb23c849. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN32149735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02a0e4d8e5c3577f87909cc7370d335bfff0244fc65ae6942367b83c1931b44. 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/QZHN32149737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e36899f6f55f6d6ebb245178290a2c74088035bcd8bc214195c07cef07fc87. 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/QZHN32149738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6a39fe678a2a78ea104df44424c7d1bc6f146ba4817922ed9bea65cf7bad6f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:56Z), 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/QZHN32149739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ce218ec6121491257a3e2b1f60f0040b66b02f2acddb652fc8850fa1d4da07. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHN32149741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7067793b54e0e3b07e20bf0c4562e8a993b517e37217b220b685afad5d54b0fc. 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/QZTBB2431964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9b241fdcad2a980a41b214d1581ccc48b6fafbccb8e946f76d03a6df2ebbd9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:23Z), 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/QT3F32455674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757e97eb53048ad4a197a667e98c1d9f104955b4d242f0c62e78119e2c7be0ba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ72544234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e4bcff984d10d7b6514613a3f2141b6d0918f5c8a564a620f865937a5e2af6. 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/QZFZ72544235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9b241fdcad2a980a41b214d1581ccc48b6fafbccb8e946f76d03a6df2ebbd9. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:29Z), 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/QT3F32455674.