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 0x7541b3fb46a1d0eb4cb65d4d6454cad23f16b5f4d019df39a53107a3c31645ee. 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/23f6e9be-4047-4124-b185-c81112fd77e0.json and https://artists.proofprofile.net/proofs/artist/23f6e9be-4047-4124-b185-c81112fd77e0.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 0xc014ac8d9f4bb45f76858a72a456aee021c46eda796112d8ab324622d25245ed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2410629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26ede371d0c477261d249a8416830efa18719b7fc4f88a6f1693b97c847167b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJX2418570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac0abdaebde93cce023475a9733db4e569d574fef71ee67c8e43d7ce2499230. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IELOI2274227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7be707ba4883c664f845993bd4e8b61e02a03cf83bdefd29c41e5faceeb888. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IELOI2269342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c01fbb8cae3e3a8cea0779abd429d7aa53554c6033e0132a9f20dd00830bbfd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9K2398043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056861cc48f647545e64e52a4204b0af9e4b80bf46efc866476e2032b08b79f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUBEC2080503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf080cd37a056a4070d6e43f40fa94a899e7c1b7d1538360107dd1e5571653458. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2364089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a980fc5cf9f4598cdac3518d93516d06b1263bdc6c57dda3aa9b049c00438ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJX2429309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dd8d729e07dd4dd5f5d708dd8ec887f7d04a77d12365fd75cd537d3ac45f52. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IELOI2270375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385c3a27f2b33b10bc64ba50bfa322ff1ff2a77f18dcd43e4a85a7a1b200f6db. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IELOI2270152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927d0e0f32c76686e092a876bc6f17af05cd8af00209c0a73285cacc0cd0233b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IELOI2270361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f3d13b33919fa5f0faa9b5fc0721dc70ba504558cc30ec339bbf417486533e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IELOI2270203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba53bac7804e2a2decceabac65e2d3bedac717549a6d33d6ec2cc8995c06dad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA41S1806317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92a7228b3d2b285d302fe5a132a773b7a3385c6c6542e71b71f7d3b7e377aa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZA41S1806320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12728c6c5fe0fe7a3fcb0b43762a30a42634809407d4e02d823d9c5dfe3c3eb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA41S1806318.