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 0x162e93d6c300a09d2497d2d36ae19fb582076c05e16790bd9e91128cbb7d2891. 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/7060554a-c417-4277-9ac5-e320a0e63416.json and https://artists.proofprofile.net/proofs/artist/7060554a-c417-4277-9ac5-e320a0e63416.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 0x61f5d9e41fdea006d9a111e8caf2908878c50edc84e5d8742afe626ec9337bd1. 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/GBCKC2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd5122e5f479c02d1550b57a552dea708d2e0f6c72a9fc4e3bda864d3e1f396. 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/GBCKC2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797b6dbbe2e5d4c4c0ea9b96b74a8a8940ec933bb7572a6ce6fb12281e987302. 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/GBCKC2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4effde059a3d964fa7dc71ed2bade78159cde41d088fbd88e88e0a4523e941. 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/GBCKC2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bf8f561ab4a5cb0d888cd4907f48008f7bc74143cba86c134ba967cdff6c6d. 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/GBCKC2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6aa14fe961651dba11df4856a31d154de0b0296c1ab62aa42be921569e50b6. 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/GBCKC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8919203809b04d4ca448e86b2e7de4f753bd59c91553ec821f6006ef9e80e66c. 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/GBCKC2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07a76ae87b7eb5e3fb7a4ba2d35037f63bff3230fb4e2943d379092cf2356b. 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/GBCKC2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d3927f224d8839b5f77bcc4d66b4b5de40b02e336d621f4eff7d0e9da8579c. 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/GBCKC2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891f9b19ead0b18a76857cb6301027957e157870616aa5017544c448d47330a0. 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/GBCKC2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e52787620a2f8dfcc16e22e993bf7974de81556d24aec7f00af52f47c1b6057. 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/GBCKC2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fc11373abd7fc9ce8b7ac089c14cbf0a4c9a60726bd51ca2f45563a37d4d5b. 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/GBCKC2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb985702b07c260cb030477f8ac64d8b269a08e2c5177dda8f30251577c59d812. 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/GBCKC2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40b193be36d5658ff10a7413a1727373c31bdd97b7985545b7ae1941bcdc594. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:30:43Z), 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/GBCKC2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac86631652c5eb471f28c0ceead26b697a19c05f77441914a43b2bcaed89dd0. 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/GBCKC2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab8e53c6727940d662d3941cf2925277bccf281fab2cd845ec3be21ca50abf8. 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/FRX201945316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f9bc58616fbb06c2234873709bf9bbdd699113b8269a9b480dfe1828ae1ec7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:08:59Z), 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/TCADN1899239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b965b9d7a1d5a0fb6e16b120e73005c9903b5a7e86fbd80c39da5c54bcad39. 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/TCACZ1723804.