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 0x8d8242caa5745b589d66631249085d86cc7803abec209f32e469ae577304a253. 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/5b5931bc-68fd-4abc-8896-f8018fc96e7e.json and https://artists.proofprofile.net/proofs/artist/5b5931bc-68fd-4abc-8896-f8018fc96e7e.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 0xa47eec41d0864969f2747e620bfc36c56827fe7949f159ee11537e7094cbe8b1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/INS250200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b71608c0c1ccd6ea93f2ec6cfd7d239e9752a8a3c41d54b281efaf857a5a194. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/INS250200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c57c119be550ef0350f5ef7e1474f94f34839d30f428e3a6ed12a7720891ee7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/INS251500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0fbff88a84e0ba1a5bd95b643e2718657af65891ed6b2857342c8bc9705256. 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/INS180376868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c4e5e5d9edf5c9997a20eb046614c0c003592f63722b1f4498d44b48c5fa27. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/INS180376869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4980e2714631a52af84fbc4276384a16458bd0bd5ff797b4ba90d556ab9de329. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INS180376871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf63959843f8a129572e0102fe627e0253e7a5f1c8b04f47588062f8b379a35. 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/INS180573245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d2c21c65281e4079364940859d44c44fd9338c9ba8dd241dbfd3311b926dff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/INS180573247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2867487862ab3b0afbdcfa634ebc2d3773a6b12c7f13c6b6af116d2a7295edc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/INS180573250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b26888d3074dfece1800709f44ced0b961feb2a1b0831d8e149ae5f0f4ba541. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/INS180573251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fad3f86399eeffa1a5d2772bc7acda7cafee32a35a7109192a809604e88221. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/INS180704249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543982884b38f9c8a69ef7208f554d7d09304c7e658c6f73638dc0c649d03941. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/INS180704250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf048e44e2b35d6c668aff1b05b4c2d84e60c4587910a77f52ad6ddf80e282790. 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/INS180704251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97483df0c1313185d13b3b7530dbed76f2912cb3e42de00b9498fab4e70999d6. 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/INS180704254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8194609805f5b4a502b442969093514f890fda6be0b7e73ef11fae9272e20bcf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INS180807424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3917ec1e37426e5dc1a4ca1cb06281ebe636be779d6061ce6d518778f30004. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/INS180807425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141f7002e90d76bf5d2e74419a8fd585b3fb164423ae7ae13a348b02b15f3b0. 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/INS180807426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30afba97e5018d5eb72cd3a12ad55eab96ed7f3587024717e4b6e11871a7cbaa. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/INS180807428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c153376fb03bce453ffd1dc3b788b2e95fcca829c0e2a7bb3433ee8a3b929a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/INV582216042.