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 0x3a6ac20b3def8e74682b11a77ef1b60e9bd6281b413655eb7de2a60e5f045f5f. 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/1787d718-5d1a-40b3-b042-b45b24341dd6.json and https://artists.proofprofile.net/proofs/artist/1787d718-5d1a-40b3-b042-b45b24341dd6.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 0x8308ca9c8c7d574d707e121bdfe22e63cf3b88a2829378d67c79454bd21671b0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:16:56Z), 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/QZN882443914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f855a86280e2362c00e5186ff45ae6e51f6e1eb05ce09f870a2fe8a434ecd0. 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/QZN882443915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979f7cb9fbac682aa4c243f1438cd403868e5a325b803d12f1a2b2cd97e59998. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZN882443916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0458a004d67eee9e9c517027e62fe25d1356b1d5508038b292e28b1423c5d60. 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/QZN882443919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc053cb6b1ce0274a6bf25237124196ea2fc128c150aa3cd4461d6b53a9c3806c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:05Z), 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/QZN882443920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace98ff625d2245c8b01ddf44137f24b6b97fbef293177a74aa7e1b46f284c86. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZN882443922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fbf1e9eab349b72fa5a5b61c4926b7947242c89a6f8a382144865eafc1d2d8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZN882443925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca213c94fe4641e6fcdcd44e4ea7e53f0d479f37458a38572d7a9f0ecc433d6c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZN882443926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf21684d340b3b11e032a0b92a285f73d833659e8bf9141a37b6f46a1ef811a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZN882443928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b13ffd571ba557f5cb6d03baaef23a641e6df957c9d7e744816e757660e2f8b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:56Z), 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/QZN882443929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af4ffa5cd42c4e3aab5a5b3de14aa7db8f7f850951fbf712d9c3549b4dbbcea. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:25:45Z), 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/QZN882443930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30376e0fcb5d0c0a04b63ec93bf6fd4ddea9e80f2f1cb5c1f89c911b2b51d189. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:38:47Z), 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/QZN882443931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41aea34480f9565ab0605102f19d343c5ac6878552541ac7321c2d72dcdf9c8. 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/QZN882443932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf914adf0384b4d91582cffca83ff5f1b634f45f75786f940d91c282efa8f76d7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZN882443933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ac4d68d2fa249fa26ea8e6e538eb2e5dcb2e26bdf94f2c714f51d1c10ce575. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:59Z), 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/QZN882443935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaf313ca9f73ff4db2ccb316d83d11a49ea776608624c31edbf13a61224d977. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:51:36Z), 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/QZN882443936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c79fd81e277042a7df7dcb2d572d518eb67d5218d5ea74c7b757e9d74a18c2. 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/QZN882443937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717cc12f8b27c601a9b43bcd2ac6afe404d65931d84ebc93fc7dc3a7f65d4a4b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:23:35Z), 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/QZN882443939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50234bdf1d86284ec5b2eb2551f3a40d07f18e697902fdeea30b01f95ca6f439. 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/QZN882443940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2ea050f8bb63f244b8b96866064fa6e20b9f4f23c68bf2ab96a4a911e966f3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZN882443942.