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 0xfe50e3ad4cdd2a616f8e85c69fd1b7177cdaa8ccd5fd4f4295206a70d49a8409. 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/bd0a4b94-2c55-45e4-ae0a-239efb74d62a.json and https://artists.proofprofile.net/proofs/artist/bd0a4b94-2c55-45e4-ae0a-239efb74d62a.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 0xe3a855abba163fc62afc16bc1751252dcc03cf49e2c354745bfd296ba000909a. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/FR9W12003159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a08564ae61b6c20701af5cf6e8bb97867de04d2f6e8696fce6f9f84180a1288. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:17Z), 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/FR9W12007416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cfd82aa4a621cc1c4cb55a603c126301c8a65faa1b9af60b9058fcb2d5a3ca. 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/FR9W12008453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d54959cda51af1d8e5b78030be8989de598fd0bbadaace55b10cb968054eebe. 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/FR9W12023918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594435185bb72a0fe19070156b828d07b4ed8473a26d544190f0ff2f5b3548ae. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/FR9W12023917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcc95bec3411b31b51e775693adc6ba59c14483b36da4d74f93be9c01d0b49e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR9W12023916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf3edf0616c7c84eb937fc54110e8409d458fd6d4c5f1c4898f67d34bf2300f. 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/FR9W12104555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ae3adacab75f97c491164055d91f67427a6ef38f0d8ffbc7acc2f13252b03f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR9W12108253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c3fe1b890b0b846f62a5c1466d839652fe14092d582190cc4ede9bfecffc1b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12119088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6869eeaf98291d9d98fc7a60e3a209e4c233b3b6c5124f3798bb98f87e75b9c1. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/FR9W12126686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99b650692f592496415d08837c5093c337b3849854679ba08d09f14a30ef361. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W12213399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8597ecbc83ef30f5aac57ab90b8906b4ed590e917a959934633965f634fd3e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR9W12213408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c6a0407082281801ac2fbff71bc53e52c7f8ce00262b827f63799c6da97381. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/FR9W12213397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47858375bc5416e2d573fd46dc5f6a18d4d30ce74cc069436b900eb36cfbe2dd. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR9W12213398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f72091b35799e5cfb255733530831da799267bb62b92cfa99f288b3f0443f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12213400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f019dffed9606654a699e646c7894c71fefde0ea5566614621a51dc76b24990. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/FR9W12213401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386e0d3fbf9363bd263dc920d76c18d0f9b46bb2d714ace435179093ac962845. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FR9W12213406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8597ecbc83ef30f5aac57ab90b8906b4ed590e917a959934633965f634fd3e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR9W12213408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f2cc09b6527c02d966e67f14ec4d05d8f2ae3195fcf3e4e79be3b5e14f2757. 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/FR9W12213409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0959eb88c6c93a91a097a10e847e2891ab831838d619d816e764950437ae98. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR9W12213410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3577e2df4d65dab6e3bbc84a25f9ba6d6f375b97fa5f0a8a4738e364322ed34d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAHO2335470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a01c3941f756d72a4653057496365d54c753e9d575fc1cda72571f2bce01f9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:11Z), 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/TCAHP2346214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6f129ea7d89b581fb9777f40a53253ece1e85d1e45c2bb9ad6ab984cbf8b2b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAHR2341920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf4b6f46855a8b29e4c482fd2076ba011fdac9d57ecd66b17f0454866473264. 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/TCAHR2341971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3448081b6b6e3add72e7a39681b51c2f1458a90055bd93a0dda67f343a0f5af1. 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/FR8Y72100454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ba2cbd6977dc82e0364a7c812a42baf146ff81c53099cd9b0b37fd36d5dbc4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762125256.