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 0x6f8156763d5b3c3ed8c392195222e430f252a4e881a254eb6e3051a09fc14fc9. 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/e1eda67b-7660-46f9-a85f-589376e2d31e.json and https://artists.proofprofile.net/proofs/artist/e1eda67b-7660-46f9-a85f-589376e2d31e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
African Mood: The Ultimate Singles Collection
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 0x38f6039de7c51704ff76a352f22bbe01ed7083d2e88da018eb00567c735994af. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USHM92274674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df8172d3f5243f5fb3da37737e1d0efac23f394ac28cdac4f30111d216ffea4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM92235477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dd340d218b64db34036361d91998bea4617649aaa8cbf6a6f5f1c4617e0854. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USL4R2331094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90328ddd2d99ea785ffd0eb0a9ea25c65b9949a3bfccb3f21fbd2686b2610f7e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USL4R2378937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec07fb3b42c35c187e7e095008ae1b0ced8e1bd71ff03ca8e0f9cffe998d5982. 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/USCGH2429076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04654d500a6f61b6c9b40dbf0cac1c91fb68f94728b393fc6be516f2ef151f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH2449301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa195019d75f03a3847a024c9c6ce9d7d82f308e0b79e0f6d9b857634adc2deaa. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USDY42429538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b075178de9c5ff7e5acb9f78129aa638d81553d5f6039bc5dad371f2975966. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM82442169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e96914655b79edfaed4e31bdd72e3ce362cbb5ffff547de043892350de528f. 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/USL4Q2433899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6f1d4d8a1eeb9f8a3b7415ba4fbbac00c438c35c55fbee6884803f131e35bc. 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/USL4R2467126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb850b5caf6f38d7658f47560c7f0af2cae385bf8ab744c8fa63ac1c274f80779. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USL4Q2475081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fde517420732487f745b7b8eafc8389256944befedf1ca8ebd35da9f2b6cb37. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USY242432250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc142519b38eac1e8250725cf831ffdb1d0e44fb8981077c3605fddf5c7adeacb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USY242454930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c61ea910fab164322944f35cff582f94c991254e387f2b7e5a3f503fc5a9f90. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USY242494471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3cf13e64f82e4da5d4d756afd380a5a56865e35ef1ad006ce8905eb19a9a7e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QT3TB2426008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41d9b7bce5d6c1c5bb1f56c7e6d1ac2a6fc060cb6231a21328507035fd9108b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ2517177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe5e29eece6c71aa24c501301e672a34b010e8c33dadb7a5c82d72a3cadc10f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM82555934.