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 0xdb62071a9bebe270ced4cf5bf498045977d30a40d15e3ffe0a7e962c281389c6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2be7fb83-ebc2-4b79-ba02-303902506bed.json and https://artists.proofprofile.net/proofs/artist/2be7fb83-ebc2-4b79-ba02-303902506bed.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 0x5c800fa3cfe9d3efd22e5d7555999e3cb6012753a35bd98ba892f8f45f768640. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UST8K1804346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b310cdb7a4ce2a2cd8a57cf908ae0a7e71ac3d1bd58b8d9bd77ad9b8bcb4ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UST8K1804352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bca6ffc986dd3815f346731c5ab22a47e0aa9b6833821027582f644fe33873. 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/DEWG82000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727d6f6c890ca4263f9b0fd378d727a839cb80765b07f16ae8bb9676bc325999. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEWG82000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ee1748d5e71a54915c863783befb368bf60465d3b9b103b89ceccb5f540eb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEWG82100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584fbc3068fecfbc26a68ca8c2eac34eb4904c053c5c7da949b41d9218124894. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEWG82100145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52086f46569bdb329451d67bd1ce953ed3d0dc7edeb87fcfc836658a7dba7990. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEWG82100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adfd6da10dcbda9ddfe674582422e9335e4d4d1a5c981ca0c0170241f733537. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/DEWG82100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57145a33f70080cec6236ed294c763843b4771d5d8879cb003b1f27cfd6a3c52. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEWG82500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ccbbb6cb593d5e5bb9f08a4a74bee2fe2817e3ef911db455e6adc4529da6f1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEWG82500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4793ffca19e3b73e880fa43d1135a53f44fa5982a85ac7c80bd55b41a6c33c. 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/DEWG82500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a32a842f8186e3b51f398c39692f0975b18758d9ef37293f3fb32215c53d5a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEWG82500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4e7f856b21bb162785132bd861be32f42488a6fab6fad86be016c2d5cfa458. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWG82500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0c82fe2d70ee0d4843c9d2bc1a21133da33c74fedc8cc9138232e5ef1e6320. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEWG82500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ec6e9444d00ae6c585d2520e2181d8ec06cac71db40e8b07ca2c03de6d4c5e. 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/DEWG82500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e4468319f37810306173e423381ea8a4cdf51c0e6c168a0576480ecb3a9ff6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEWG82500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57145a33f70080cec6236ed294c763843b4771d5d8879cb003b1f27cfd6a3c52. 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/DEWG82500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94bb663b42464d4633325440562fcfbb7647ead4bf19b46db27493156014d1e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/DEWG82500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a442159edefff476db2f5eab390726e1c03f920b3557a9f0c04c1e8306e8a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEWG82500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ccbbb6cb593d5e5bb9f08a4a74bee2fe2817e3ef911db455e6adc4529da6f1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEWG82500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10004ea6a5a67d7fe0c2d241b2e94045dc337ed7215eba0e88e147f8d33c44b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEWG82100060.