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 0x41743c83e3152fa6ad5420d3d8a6e6d6e7722e8da0aa11cb52fbafcb48fccd59. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/104a90ad-42bd-450b-8bbc-936cf855430e.json and https://artists.proofprofile.net/proofs/artist/104a90ad-42bd-450b-8bbc-936cf855430e.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 0x49f6b62aafb4640db9ee6a1a2c0cbb88cb17d4be8eab36922467fb23329b5a4c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22363006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cb1a729a0bf8dcde23ca66ab189df89ddfddccaf4e6f47012bcbdcb45e06b5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM22363008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1ffa7ef773517107f8e40efb173d5aa1968d3dcd364eb19132bd8eef0b0a27. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM22363009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaccd4d361988e8a14f9caeb8fc3532b2e58a394e59b8cdfe8285dd31a1665f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22363012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313f47b5f982207a14cd66ad701b98c4747212d04d6fdf8fe1bf4d424839c929. 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/USHM22363013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6de7870b3ab4049235efec652674344e8331586359a4c9d5594fd340552a05d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22363017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03808d9db6d4481dd24ee1f139b49d4125118712e9daf5b79e17250997d6d1d2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM22363018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2407e2901693d778734c43a918eed1d6fdb6c489aab9d4cb5dcfe0e8a0d86a2b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM22363020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4889fb39c9d8085a7056049a6da4fbda679c6a1c8498d0d7230c2d0bc1fd4549. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM22363021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336eeab39ecc7d76f06b00b749ea304980f5a9a08dfcc601b2a349c507c06eda. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM22363007.
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 0x950fff003dc8a58cfef655a5a81c3ed3200dcf698507eafeb9d2d32b8412a322. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM22363011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fab1f9162499cd1900df581561f3137fc4ebd098cfa738d7b5479bc8d7f3f54. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USHM22363015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea29fae18735d20a6ccf635705e77f2253042fb396d3014af6c6f7b536501eb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CLKT22003331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c7d0f4320e800017c24389fa8ff790f5371dc0a38bac2c12dc14e874d2a1f0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CLKT22003328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c607118306ba678d1da90e7ab5192e9574d2a37fa1e27687be0e7daf9ba646. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5752146972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d3a973e8e6a70bf3cdf610acef22ea9afc4aa82502b2262f72b84697b9c9ec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5752146975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641bdc050b575503ab50714c003f696f339f268bb78d2a2aae6015c7ab63e490. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5752146976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0929ac75a94056f3f68962d2d5bb99d15f88a457e202c48e6f84a02b0aff59ac. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHZ52288405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c8b46458cd126d545f80857f3f22cb77b20051b8205a866e344d0395a6c5ae. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGJ2104948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42da767e274b93e4e16c7805bb75dab5b9bf550f8fb7e4fb2360c638e5b64cda. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGJ2104949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd9f3e38a5a47924206176d8eaeee65981b10d9a5df9ca0f58659281f2d2a36. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2104950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1d4b6b4ec801e0b5042f819a30484ff1eff568395c52b58fe5d08641bf6a57. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ2104953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3982a6618f14087172bfc8a57b32a3631341616db5a0d9a20f2ed8287df401. 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/QZTVM2218434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c48e92a7fae02f780e242f7d26e89ece2961f8e0989623c94cb9ad46d490db. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH2199627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e4e64e77afdb8f8defd29a9e479dd6bfc43e64c25cd73533b494ae6f51c16b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA82063434.