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 0xda5eb950b543120eb8e596a2be7e7b685eb5a95bfa5ccb17d08db603382d1e5a. 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/76e9105c-95fe-4eb9-9561-85a8604bfe4e.json and https://artists.proofprofile.net/proofs/artist/76e9105c-95fe-4eb9-9561-85a8604bfe4e.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 0x3f972fcfd5987bdb0623f409d8038092eedcd57005bea244ea780d921fa90c83. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:06Z), 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/QZMHM2533010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49beb51ba4ebbaec14211335cf033b5ae327308271e902dbedcfb1074b5bf7b9. 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/QZS642563525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61de744b661e878ce12d30cbf538ae0ad606408922db8658ca444469f2fa7cf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:17Z), 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/QZMHL2538528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794eb88fd6300e82853d962cbca2ab8a075617037abec95e885298e88c82719f. 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/QZS632524281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9ec014cabbe71cde3a6a22e768e54200436148e7c75c5d924275c6f07875a4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZS662411617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b40ca9c2639ddb0091a8c40b0caa1d79b6363604e630629876d2818b03e1b1. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QM42K2428502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1c91ffecd279af62b5ed3dbb26573c826918a1031159bb76ea9fc6def01e3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:17:26Z), 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/QZMHM2427494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7c4633bc1c9d02188c6a2b4ef9e3be53f1e1e8c86f8db73f68f758383e1a28. 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/QZS652465343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923d5cccad7c1908c3ec9bcb09613b36f5544198362cd3fc2a2897aef68b66c2. 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/QM42K2453900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c8ed478376d1a30e05a9eea00eb6e2c1bbc722435757aba270d6e31fc54de7. 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/QZS632432628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5f7621e1c1ae2165435d3fa8cdbb8a52f5732ba6b338b58b3c98b27026057f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZS652465975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd7516b4ad42991ece560a95a9ae9f766271ec51cb69d8a67208acbe9dcd6d7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMHK2548844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8791c636a0152029ede23e4ee73a50ee6a1b5e7c40bdeae56fbb30897c349b98. 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/QZMHP2443748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185a3a29db00c18c26476b8dcbdd059096f66ac34f1f90e7079a0b4f6f8ee9d3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMHM2556428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00beefd07248d18ae27b129558ef17c3676a8351082b396bf06a391896d897f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM42K2599130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc801259ed0e04a3b79c52de35c6a0356b9251b6c169fcaef940d04b127250e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMHM2590404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a215b0f695d31c40b7f91230830a2ff53885cc45ba301ba18cc303153125ce3. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZMHP2506493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62cda2f404555352819ef8c3b3280b41ef68c0362d733f6c0ba9dd7a5b22534. 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/HRA242401238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873518432390aad9bcc0a15979107220d7ee0d1f76911f790c79cd688b330cf1. 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/QM42K2553822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddd9d6be564df42e03bf5df31f9b4c74ee0b3e110d0190fb98d640ef58b47d9. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QM42K2545774.