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 0xd552539ae81a88a0b0dabfef06ffd1eeb0e396c43b0db1bd73c1da3ab27d5db5. 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/b73052ff-f504-4c82-9b45-dd9e14487592.json and https://artists.proofprofile.net/proofs/artist/b73052ff-f504-4c82-9b45-dd9e14487592.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 0x6a1ede3b887f83fcb5c501f3dde5a180701a9afada552a39639c0d3b59733c83. 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/CA5251600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e209ef206fbe1b08713a59ee6f9deeb427a815e5cd82e9ceb8bb627ca0ebcf2. 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/CAP681642007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cb044abf910b55629d6bd5da0e3f509e8a4fb0cfc506f9a25a205507db6a34. 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/CA5251900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf329bdbeec28fb62b4466df08c89c81cf416d7a27a3b8aa5e98a0a31c420528. 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/CAGOA1800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b77d10372867bed8a29f574b7eb053b2fc4d3fd620395bed91442f21b6bff. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAGOA1800218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96354f97787526801e9932af765558c8ca40515173d007f0c81806cdb421c96f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAGOA1800219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d884796cfe5b2cef3f428a887e7ae9234d8876233b4ce045e5b5bc6c79fb0f3. 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/CAGOA1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7691deb5b07b91f277587e00b6a0d8595ab7ab4defb29cf95a481beb070fb9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAGOA1800126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec957a2bc8ad11028f0d80b7b03dff849d3dba732aa87573cc04c523c0ed2e0. 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/CAGOA1800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c6c7da78e4acfc088239ebb10cc67a0d58b9fc602929a84b631abe8dd5c57. 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/CAMLU2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a03460123cdff9fcc6393b2b1d19f0851c67b8c147737a3921cc3fa72eaccdd. 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/CAMLU2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915014875620a0788f741d0eed6151b5a15e85674e98578ef3595c687cc3687b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:46:43Z), 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/CAMLU2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc652ed26ab31874db86201ffa33ff76fe6866813ae671bfe4d84108416963b. 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/CAMLU2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1fb31c01a73236edaee84cf41ed6e3fcad3c00de8976b01b9833d53017c661. 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/CAMLU2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11514b604240dd6a7207b64901c926d58e81451d4c4af29671a447c0dc911253. 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/CAMLU2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07403ca5407ec1adae4ee59e5c7812442efb33b3a5a4ba14b7df2cdd0a485130. 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/CAMLU2100055.