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 0x501e711f9da213ac01799beec9ffc692a90d2e66fce47cbf01851b07662bfac0. 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/68252eed-de0d-480a-8e96-8e37fa2c7f51.json and https://artists.proofprofile.net/proofs/artist/68252eed-de0d-480a-8e96-8e37fa2c7f51.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 0x4703e1be150a7fcb624e70f1350f7120cfdf0a888167c706e40ccd44bf6734e6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:08Z), 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/QZES62060468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8840d113359cb2ea0628492d634bea319eeb1f0aed5ffa8c5235506f3903fdfc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62060454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04d434ad59017d79ddc19bbdf1ed9d2cdd4a82caec042ac547835a7b181af33. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:42:08Z), 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/QZES72010474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661f8d643e3dd8a2f1721b01a2db6b1c6a2f170a2e4efcc8f032f37ea6f0e76a. 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/QZES62060445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e734a19e72b7b3c8a9220f24ac836c0df1882c2af5de5ccaba611d2977a8b2. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:29Z), 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/QZES62099953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91742a53484b6f28b52140079d28389d7db0cfca71b608d0ffd01fe8bebaa71. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES72009593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855123f518a323850d8cfa1ec48f64e5ec20c7b00c8581f9c4832853126ef547. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:46Z), 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/QZES92052507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb29a65975d0be1adc7c3d137955f43994d09fe0995f2e9fbf79aa2ae276e84b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN82069643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c334392e1ef90a626ca912b04b26d3ca947ea83e4cc984ac4842f23fc6044f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHNB2059678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f88829a6d1fd1686a4d41c84ba3eb8a7ca3997ce04be45f540fa9a0a58600. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:21:31Z), 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/QZK6H2082238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed900e7367c1267e8d8127581023e3a476fbdf6ac2bda7342fd8e1cb1971c516. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZK6P2339301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d533b64018cf13bf86946c31a2e5889ddac10baba9080a79e5f78615fe7db4a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:47:22Z), 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/QZZ7P2463151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6368965522ab03645f6032e8bb27d71d62a72a2716ab3beaa039682cdba02e22. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:22:40Z), 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/QZHNA2511684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43568bbcc84c7dec6ab6103ed3fe551e139ea3e0dc3b586a06009040d559e74f. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:17:07Z), 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/QZTAY2514188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19559b70176f3f965e179004c3c123923d857ba3114b105be9f428fa9e79f68. 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/QZWFR2541180.