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 0x4494a71ad1c9b5d8d5bfd0125845335edfd6ca09b2fb28fbd837abdbcbdceec1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91a25f14-eac6-4004-91f3-2b2c017a6205.json and https://artists.proofprofile.net/proofs/artist/91a25f14-eac6-4004-91f3-2b2c017a6205.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 0xb68104b893fda2714da266816cee3e9890ec498246fd82e9538abd1e08d95d8b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:18:58Z), 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/ESA011663355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f98b45d447a7d1f355dfb2198be27ed72c417ec1416af1731c9e5c197a869c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ESA011663356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bdf271772cfd5ef92dfe1bfe38f6de90d0b293e0e57d2af6ea2648fa378236. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/ESA011663357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1b2ad7b45a0348e4cad6b774efe56d56886c701f2670d241922392cc07728a. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/ESA011663359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3967a423ed3f74adfe090a46ad326a6ee23dee9c70ddfbab0b1a98adf7648f. 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/USCGJ1003184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f4d9279b39fd081a836c62e3ae48ef8d60c15d9a110e61206bac3a7b01d150. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USCGJ1003188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910329db555a3352e6e203a42363fb55cb48e9aed805c72dbb8045e4c0b93b74. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:54:27Z), 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/USCGJ1003190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7034b3d58e329e67590876b2729645fc0d87353cf340435e056285fdd42d41b4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ1003191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945a6bc14008864ee49935e0e68d4dd4e1e2f8abb90b1d5e9682ac5203cc2c21. 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/ESA011652131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa397a95366e5a9f78809df1374480a404b1e4537406967fe1396970d24fd2c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:52:04Z), 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/ESA011652133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac78f23ef1446fd42831e14edc41c6093b0426fb6d78c7e21c723f537a91da20. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ESA011652134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8d160b3bebf3fbd9e9ed6168d054256268173c12c761116c6c1f2b76d2be80. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ESA011850141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ca9641e6300788c6915f14d4a61e36ee09433a3ec37f85276953eb1ade1f2b. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/FR96X2120531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc90cf68469fea274a33be9c3dd09b32007d4bc8aac4212f1f891e67656ff4. 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/FRX202100634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff74f19b8222b6017ec4d4bf98d72da4382444b3a03bbc148c78dff16af34f7c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USDY42376092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7e38226e3478e64a7c06441f7cdb57a8b59ec02464a7bf7a7668e7aeea2052. 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/TCAIO2410171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dae250edc1bea1615d16b6495937e304609d1681e6c981f167d464d1327ad70. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCADQ1848129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30c6d4daa87bd6eacb96c4ca8ea3c3c73b79284fbff3974118ac3446635a07f. 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/AOA031522642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63648fce38b3a3667391ace6419458911cf266fca328fc6da6f88341f95c240a. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/AOA031522645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e41393cdd07d43fc55b82fcd54e06c4fdfbfe5b88e85cac7b95a43b68eb304. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/IEWGI2359419.
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 0x2952e7d96230467cfa2c16da0c9cb18fac241d1fb13f308df8d7d2d378861b6a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/IEWGI2341930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849313b64643a829ff4b127d0e7e5b738ada80af7bbab66966a24be8abdd8a6e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR6V81426253.