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 0x37a69e64ec9d8c686719d82462a9b90efe1ae2d7f5210282f6afe1ff1d8f3645. 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/ee52a282-a7e2-4dfd-b6d3-2cdc6332b541.json and https://artists.proofprofile.net/proofs/artist/ee52a282-a7e2-4dfd-b6d3-2cdc6332b541.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 0x13c55a8dce9b05956ae9bdf2cf65c0519a7781efe2002e961b3414592807f010. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USA370641003.
Why You Wanna Make Me Cry? - Live At Slim's Y-Ki-Ki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20132b8b8826af3b1ea77ebb117c0cf7a26b0f6b8687be380f994d7a8ef1695. 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/USA370640987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc2bc81f4db8ef5a9b0dc1a4928bc44fbb9f918767000bd2bd1251095884bd9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA370640994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d25deae610c1bb93aff606000923d3d8b00450933b155fb73ddc5cde294d400. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA370640998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7f55249347ec21f29fb9767443c0ed7763f911f9fcbe4a83f7cb9c044480de. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USHM20933705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801c997bde793e5249907a61177aba8d60043b0a411e9c149562b6f63435aa39. 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/USHM20933706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe561b375c9d6f53466083786467b29427503d02e92edadfd88f806318e85528d. 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/USHM20933715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecea153e92371000f286afb5e222e705d443ad3614d5e1a38a066d202166c15. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM20933725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20fdd4acb831e7217cb9f09f465d58d3122c2da93081584dd1a4678215c5653. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USHM92014548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea2371f23e3c672c81f27719762bcb860ed43252f4c046b929a2e4b3f7c9ed6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM92014550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad47f3828b400ce44e69891c50a533f70bd7e0a40e433d88bbaf6ff206cf9759. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USHM92014551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0615e4081b493f19a24c56e6b05310e16baf59d20cbd6d5e2797639a9575213e. 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/USHM92014558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc01420474ab7f16a99157f1967e6b4c121ff51045794a32395e99362c8fd3f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USL4R2526916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7454d521490d2a179bcfc66a5a39bc92e8d71a5e4194f47db819ee0a31c6ea28. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/USL4R2526917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edfc987dd7455782a387bd73934c3932aa1386383b898bbcf11a5d6744a4a03. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USL4R2526918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6342da50f1e7852e1bb71968cee0560a3a756cdce415cbef2579980ddb1468ef. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4R2526919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac17c1708687abb11d39777fa2fc6ae727607a5fe2cb9340a5e57f732805e6ca. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USL4R2526920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab32966e2268e7a08f3891a08e209f73ce25acdfec63f4b7ddae33234c1f6dc7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USL4R2526921.