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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb1b2d66a3fa6fedf61b71e22c0c6ab79ad080dcb0ae2e7e522a68f9490ed92. 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/d68c6ab9-13a2-469b-9bd3-5c9bfbc92c4c.json and https://artists.proofprofile.net/proofs/artist/d68c6ab9-13a2-469b-9bd3-5c9bfbc92c4c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f95a7f227c7b3b553c3ac548562f1a99fef236c5f2d286f9dad22d163cade4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM91607990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a27f337b9f14d64e3aba54d60c18f5a277cabf12417c141c8233d1798a349e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USHM91607993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd2d84d725bfaa36a138950a5ff81e002a62f740031ef75f726835c6ef05816. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USHM91607994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba3f3419d9e6a5d6a78d272acf16b0fcf034ccb1be5ba610151a96bd3e9ebd6. 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/USHM91607996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f5e5a91ff1b7e413713c4ff476ee4e3bd7c13a17efb67b144e57ddbc947046. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM91626114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ecda768a9918d2b97a9dc139c70b98b2416c0a07253570f358639f7d83b10e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM91626103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1615438cae9e6ccdb61280b4b07b3ebe8eb66dbbc8b326931ed275ea5dfb85b. 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/TCADS1807461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261931aec4aeaa65c7e8a76b7db9f30160375af26219eb6f63623802c15fbe44. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:17Z), 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/TCADS1807545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8614d679527569a1d527cdff77cfa0a836baa3b28532eb416953f8d67b00c59. 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/QMANG2225687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11b6e0023ce76287113bc01611b05445975f119d0bf348c30d71763af4797ed. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:32:30Z), 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/QMANG2225689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2639da6433fe02c3457815a4f041c821f1eb0507d74f8ab18f99efdb27bfbce7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFP2382932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5715138342f053635cbc612cbde96070939d998e9c032829c710784cb28d5d9a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFP2382933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dddb907b9855e37faaaa00fb24fe9e231f6a662107851bbd520c0a359d65f3b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZWFP2382935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ecda768a9918d2b97a9dc139c70b98b2416c0a07253570f358639f7d83b10e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91626103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e06738d398e3e7585f5fdafb64878c3b9c98b61499b8f3d7f3c77412d08dc4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91626117.