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 0xf362d2752001875614b97c3c549077e4d88c67d6c74f45a6d12e5e34d65d311a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a93452c4-f469-4ada-91b4-14e99d62a4c1.json and https://artists.proofprofile.net/proofs/artist/a93452c4-f469-4ada-91b4-14e99d62a4c1.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 0x195b64a4982a81964bb04c10c06a0ce663bb3f20f003cfdeaabde5d180162b06. 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/TCABG1289321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe621c340a59e9c2a3fe685d7f0824ae3801844f5fa4b09b5e7311181aae21438. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:41:16Z), 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/TCABG1289324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22d46bb80fbd6b0e9b3b887c37331af9f8dad8f5fb3725f902c5afe3e708a30. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:02:51Z), 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/TCABG1289325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11002bb965db5b375c139bcc2ea3eb2bfe2623b36f96195ad463f1768a7e6e52. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCABG1289330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69adc6d463f5be7ae7ebd866646f055d74cb2ae85aec0af4d715374fbcb6a3f2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCABG1289331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa794c38a5a24ee3d13031ac3a2c049731b63489958b90c264be05bcb341f7868. 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/USTC90997376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0bb4a0cf85efc325668ebeef063c3a0f73679b433312b96b1874b274958e56. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:31Z), 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/USTC90997386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd29fb5d57063032e27d85b42441bb6543d749b1b15fcc3b31f23ac0aa9fbaf. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:08Z), 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/TCACF1574026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec6a94437677e94c5931df6949270785937a7fbab3007b56222b87757202637. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:49Z), 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/TCACF1574028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a895e830573938f5bc2df1b9180917a2c18751ff78f863f52e68034acb452e9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:37Z), 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/TCACF1574033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a156f901e9bbe40acb91bf728e4b8835632d66725fdd9e5401cf5af8fee984. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:27Z), 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/TCACF1574040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51031746759765fa9688ad972b9c25780e5f5d2b6a27b3d99c46a3169bf7e2f0. 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/TCACF1574042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427d13840ee95052c12b5397181660034175fc57cc63afd17c0c3a6f385bb9ca. 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/TCACF1574045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627981034d6f0493da6b21bddc22bd873aa67406a612601ba5baac1f0c21b31b. 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/QZ2J21500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5545baccae4da6ec479d8cea8d915280cc96eb067cd58ff210ac84c9d6424f. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:29:15Z), 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/QZ2J21500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48caa66424d13235ac61c6104b7593ceec9a7267dfc5c1fe9cc4b6e1b38c2f18. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:04:55Z), 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/QZ2J21500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf377389f7779cf2d192c66ff6b4ef4e9ae7a913bb3fcc6dee878c252f340c93. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ2J21500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bcf99c780c0b2d8939e7113f916a2bc6d120095e2c6228f14d6028c3a74fe0. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZ2J21513540.