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 0x0aab18384bcc12e6c616a641db915196c4afac4729120ff19148188e2bda6be8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca768ce4-6090-42ec-9b9f-cec384051bf8.json and https://artists.proofprofile.net/proofs/artist/ca768ce4-6090-42ec-9b9f-cec384051bf8.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 0x8cb353ce899e4b26718f08666e8c00c601b7e8c6fc3e395c00e00052be6f90ac. 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/FR59R2123773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a845475cff0ab6b5389294cfe4fb810214fbbd922b90193211f7f91f9ab7e8. 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/FR59R2123776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c31eb892118fbee28659520df7d833a47fa11448205f694d095746ac968df7. 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/FR59R2123786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7467def069123e6674d03bb0605078b959e86a361813dedbd2a6a4faf3af49fa. 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/HKG732258409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e04cd7431e96ab5dcf080057faeef2f94624042444ef7af262f5b915b1eb7f4. 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/HKG732259644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c2a2c0a6126ff1366dc52d63907e82109701da9c7b6ab3f172ebfd2414125. 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/HKG732259689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9532d3a49fe7db133e26a2367cc3096a6b115efeb66d18716d73f30b315cb3f6. 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/HKG732259690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9183f8b84927be72854be32f8f24b6c8f918e5c704286f94997a5401efcd66. 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/HKG732259694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2362be5628d44d7a2f33b005588e19f1de91b9fd08e96f2ad44b6ce29f41563a. 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/HKG732259695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66346bd5efe0e3cae79995010c33c1b6024c408b31529174266e47d3f0316771. 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/HKG732259699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11195b7e33ea31ee86b9bfc551e7518edb55a6928897c2431912f8f7a24ccc71. 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/HKG732259701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cad49dde957b371cc12a48bd6e1fd8299e4074572392806c0bf6e4195a2bd6. 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/HKG732259610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a68e591cde47f23cd25c52fb41d4328871cc188d7a668374bfb287c0b247083. 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/FRX452195950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dafd0540f4cbcac5f5836a9300d6e82becbe4365587ce5cb79562f3c38362e. 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/FRX452195951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f36006b4ed33a23ecc0cae7520e2dd466dc11dcdd746b1b2a2e75292026d8. 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/CNZ302001751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4bfbf10d68af4f5373484f6970c076fdbeec2bc0f2d2deb9785f78a2a63cf6. 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/CNZ302001716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97347cfafb31286d1d2f50ef4ab1382dd81f04e9c38fea5b8e6d721f9f190afb. 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/CNZ302001750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2920e9c43476b8f254a82c635973a99a18e898d05afc51db6f6883011766bcaa. 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/CNZ302001749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45a5b29665a96bbb15dac6d765d6d91fa807805a31f250fcc7afa8bfb49bd96. 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/CNZ302001715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b7cdf1bf3a34a45e57028818a23b9cf37711909af6694b2343ac80f617d9d. 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/CNZ302001714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b031da1af262784c7f7d01a4d3df09c0208f854ee113517d6a93be95b55a0c. 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/CNZ302001712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d16d6b862608daa26ba709a91dbdeadc8b016be5f549d66aedbbbfc2f57b63d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:10Z), 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/CNZ302001748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96a700d13d02c9447261e6fd98deb8e7f15cec0ba10bc9d6fa97c50037a22a. 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/CNZ302001746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550f77cedb2a53f1b082b13d32d93004220e2e350b81bfb0a6a13dbd5e365fe4. 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/CNZ302001710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cadcdb4ab1c3b7f5be05a31085057e5f1f57294a980f42eb4f897f7c9637588. 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/FRX452190848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96128c27f83f615861cb4daae3e0a5e075bb2d86029d959b2c27104fe779f6e. 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/FRX452190849.