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 0x0026efb2c73dc38d4ccad4a3048ea5f25a110a3ad2fb5f1f8c0404553cbd17b0. 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/80daa294-ab42-479f-96db-1b664756a118.json and https://artists.proofprofile.net/proofs/artist/80daa294-ab42-479f-96db-1b664756a118.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 0xfe2499184e55f7703f37db805161fdd4930a4f65d9b0db623ea2d9371ec06538. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES5152200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b88d8e34eb28b09a7aa1b29197fb5dab7cc2e46dcdc2b19e309dd057149205. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ES5152201063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146a2bf784787ae5714fbc3cf7add582c8f55643bca0aa432d6a7be5ff93a660. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES5152300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fbd5a252aeab77872bbe78ed21cf5f984a92023dada7f9e90c740c292148a4. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ES5152300494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9bc6d0b5420bccf489189fbd012c144a9c0562c43c041b05eb3af0376d1828. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5152300638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d434196e3b0402a941c50c52bfaf42f0305e6ad47db4f718155412dfb012e8b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:38:15Z), 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/ES5152300631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb319c7efee73fafbf75ed1392a01d72cd6849ba2ee238d1a955335fdfe62c323. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES5152301008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f824aa7d770e564ac38f02437fba2e3027adda0f3197ef64e43dc947cb3ac88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5152400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9794c34b905a2850c8ca1f46ce03e9ad55f4f1c52352617b430e340ccb4bd6b0. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:26:37Z), 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/ES5152400554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05257cbf4bea5a347ef214fee5e38c06b480255198957fc725fec95b17f7e67b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTPX2396799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5702893e98a8b7ec8d2fc5f1311771fb4c712da1280da9edad7c0206cfd8a8a5. 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/ES75E2306695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5066879d37b97965315d99ac6b1a7a7f87fbe3a9fceabe3230543329fb5cdd. 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/UYM123000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998eecd7f70c93d44e76887c125ae5cdf06f89092e853055b04823cd18f5cc06. 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/GBMA22434055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a4d9ff4def88b1a79f3d18c03d33ec6d88161a7b7b36e6b7cc3f6497f67bd. 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/ESUM72300632.