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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9776bf8abc676dbe04ce75716b6814206e8a5cb25ca7e1242d214ae9da3c70fa. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f0f1315-427f-41cf-8b12-f6c1f8f26725.json and https://artists.proofprofile.net/proofs/artist/2f0f1315-427f-41cf-8b12-f6c1f8f26725.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb884274875606b726b1aa628dfa0aaa9cf23c4f8837f18609d4de696f59aff4. 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/TCAAY1132987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8518b8c3dafc5916cc4dc6df00d4baf3708b42d19a7b651eff37de90aba8569. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZ4JJ1603244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e8039505e92574364324591a00ccd1344fef77e613429fb851554f48e70da4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ4JJ1603245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d266d94ccc0d67560988b090362af4f82a85e63cfb19d80d9d99185f23f4d3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZ4JJ1603246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224ff53adcbee4a55ab88e0331e18ced0ef4c84e6313ce320277efa5f46bf45b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ4JJ1603247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9795bf71f425eccf009e0d60c70a5e9b900771aef634a91767107b5d60f5e707. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM2PV1593349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8783cb64991a9993f4fff88894c23e1da79c011c88c9290d7a2611914f1d6e6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM2PV1593350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941e3f7919641771676d6f5854e3d3bb00f6e2c9b402d686cc776920ddc5b235. 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/QM2PV1593351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e2c6ba2cdb0870891631aa3e43ff114b3704d569c93f2a44ed337826b01e7a. 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/QM2PV1544108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba89d725c6d70bcbccc0413600eece167df546a5e9c3139c921bf6b4268c78c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM2PV1544109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356f555a2f3d5cd5882c21329185b2e4b39a2523427ec800d3295184f445fd6a. 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/QM2PV1544110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d5b4aebb8b12f8f49d6b8589be70b162b4b1babb1ad9780b9cb85747a70cdf. 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/UST8K1552050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc065aa3df5467f886882635ad9b39fd08c918652bdc975766b8c62bfd5e2578. 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/UST8K1552051.
Scientific Committee on Antarctic Research
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81288225897988e9182775aebe327294074f541166e995cd9bba48eb6fcc4f8e. 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/UST8K1552052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd15b3115730b0291f9f391524f1f4a547153802c06f41eeaece81463ba1bd1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UST8K1505699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb55b95269afefb3bf25a56a1088ec13989aff34d5a8b842be029638192993c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/UST8K1505700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb528d62c2290d1e5dc5f285f43eaf7db0fd6496153e76c0932f386ebf8f5049f. 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/UST8K1505701.