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 0xe2fef077d7e82b4e2e76803d26d48ad594f7c1d4cc32ebb0b32d7d3d841b4f77. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c146df7b-27ea-47c3-b6b1-5643010795dd.json and https://artists.proofprofile.net/proofs/artist/c146df7b-27ea-47c3-b6b1-5643010795dd.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 0x4adae136a7123e5f471030a0370a0f5d451830e454cac328d34f0db0ab9836e7. 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/ES71G1924523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee2158b432668d5886a6cda6911adaafdca02a497830cec3308b012ec62c174. 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/ES71G1924524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e0cbeaf515a3bbca468254c6eba4570301cceff37f80c21c53805114077660. 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/ES71G1924525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352c877005b12c3e3ae9411b7a23e1c8c576a786e08aded73aa0977e143ea845. 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/ES71G1924526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9dbd75af5a8a76b28ba2b1337b3ba315a14b7e4ab9906cbb08576a8ccdbb9. 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/ES71G1924536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5a803ef50d88cbffa8f11ad697d812af95ed1bc7dcbc1d0c6d84ff2f86b3e2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES71G1924529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718311f07e4684813a7acb546fa3a506d2c3f4145c6e790fa43a388bc5ba9258. 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/ES71G1924528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57d4e1f36956d80a6dd874a5b4fbdb0f54c03aeab9500164dce0b32188c47e0. 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/ES71G1924530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa63be0f7941850667777dfad3d43a8af29b5ccf17f1ece7331e5e3466d1e2a7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:45Z), 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/ES71G1924531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c53900474579dd88ef7ce7337d5e37547119e9a49f23b54e9e91dc5cce7afbb. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/ES71G1924533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b457aceb28d3cc3d97da223fc69571a97537e729c111f3a80c894b96910541. 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/ES71G1924534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6c8508f5df00d00f25c1b81108036615f5d5a4b1dbefa503086b057688ea81. 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/ES71G1924535.