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 0x1424469582972fc13ba0666b775bc54366de89033e53e5cf4869b6f8b88236dd. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70cae8ee-be90-4495-a709-8d855a728c7d.json and https://artists.proofprofile.net/proofs/artist/70cae8ee-be90-4495-a709-8d855a728c7d.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 0x3d2e155a76ef43bee4de62b85426ed30bdfc7b8b2eab122d238110e5c0979f75. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:23Z), 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/DEL162050501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74e823b07200e627b778c008f7b1061011ddb4fef435914b149d9224ff5a038. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:23:27Z), 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/DEL162050502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd045373c68e622b54904d052cf55e09a45d026c8258e6bf2e0684d0effc6f409. 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/DEL162050504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398bfe019c72ee3d6f50c763e1b24fb70c990b240aa1c66dd55309ee5c1acf79. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEL162050506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e739b6f664bd1e9b55977021c873e634a0a1e58710a912a3af9ac4f64ecdad. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEL162050509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd8451f36e35aca9c7e103a47c1fa3ad3583507c8d28f122a45f7ceed8cba0e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEL162050514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56920c6f8353a4ea481d60a04162a690d7f6be0f87fb220caa90d96db1e4e96f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:00Z), 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/DEL162050515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f452e3a470a9a69e026e3b0931fbae09511face1bfe33ce464244cb2cdc682. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEL162050518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37fbed317f83bdf1b9e7f20f905f528df686e2059dccfae6171a078bdaf5145. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:25Z), 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/DEL162050521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f1731b662c263c3769137c4cca7fec6fff9602ea579a183288378aee37c374. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:43:43Z), 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/DEL162050522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920874f0e14fe2eafabe08940dc905ea0a2729211fab953ca3177aa0960747f5. 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/DEL162050523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385106dc893fc9180ed7676380b3e17c19ef40650f291ee11dfb2267a799e5fb. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEL162050524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7279796e1eb4fb7f9c19779bbb73719d264f80109f22996e3a8e648216ff8a12. 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/DEL162050525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0349212d981c352e9e545d2d7c0d7824aa06d8c66d63a80a3edddc263172bd48. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:14Z), 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/DEL162050528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d642d19335b9ccd090264cc4cab037563f50088cfd2e6fb954328823f7c1a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEL162050529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d2bcfdf4313523ba30b6fa87b66f5121d877237c149bc2abac3ad910ed5e86. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEL162050530.