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 0x9e1d6455db1a5b7ce5347d7147a9adb781b9cd564f6941f0373dad233661617a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bdbca99-605d-4931-8043-1a454c51ad0d.json and https://artists.proofprofile.net/proofs/artist/8bdbca99-605d-4931-8043-1a454c51ad0d.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 0x8db49e472e20ede29d0a189aab05cb58973f50b205b8b39afcc31199af1ec34b. 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/TCAFQ2167018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6b7516a201c02e6c81c9b815c56acb3b278d7ad5eba969af831363509d3806. 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/TCAFW2132447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594813c689b33ed1a762a7c1a642a44e1f6ab287beebcf90f5032c3264ff9289. 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/TCAFY2157363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae1fdfc6f96081a5f7f2696373f4e45f95dac13192cc9f79b9430ff5304332e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCAGQ2215900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a286a655fc6cdf3a455c4009e2e4a41b5a5d6eeb65a36ecc4eeb9ec7615e3ad. 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/TCAGQ2215928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbdd0772fb53e53ea8595313e241fceff7ae79d87ec65550546b5a1685d7e49. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGZ2388561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c54319e92f8849d4c3c7d758df86f7bc6ab3a1bd8039bd7d1d6833a10740d4. 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/TCAGZ2388583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a64f5a7f7d173db4c160169c1c6628cb87152c77239ae036109e3430742bd4. 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/TCAHF2338001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709776c21d4f071f65aaa6f42a94590f09a812e911398f6429c9991a2480426. 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/TCAHN2377302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582a20f772c05f3d51c9be9c1a40f74a54b4b734c1b79f116f8597355f74af0e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAHS2371860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc940989691710dd0bf856bb8d2a0fcfdb0c94afc276285cbeb89a51cd980029a. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/TCAIP2474056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d2d6283196e675b4ba9284d352617f31f00cb8fdf1f03e9c5babb586be9106. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:55:50Z), 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/DECE72107713.