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 0x1fa11c7c996bbd82b6ad587673efe6e3c901bd80aedcf440a62f7bc3857378c3. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8156cfa1-bd9c-45fb-b635-b99fed6040a3.json and https://artists.proofprofile.net/proofs/artist/8156cfa1-bd9c-45fb-b635-b99fed6040a3.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 0xd5dab4db1f5b0ac5f4bf9a4ea990b57be529b10399e17d6ff05083e610e4c3f0. 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/USA561214462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fc35bdc8c2ab100cec917e330f513d6d62e0b3aae672e036edeb9c33893036. 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/ES42G1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7178fa1533149be72cbf74760ff0523125abbf0f992cc362d43b43e94768230e. 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/ES42G1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a351d15c30764f22d5552ffac800b8e4b6c4180f5cb6d7d1d3fbb797c7f6a. 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/QM6MZ2114418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aa49afd0b53f406479f987c8c9eabd177956fafec1b293edb04c5a9a770613. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM4TW2581457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293ff7118cdebd45e6edf3a16d3bf9362cf66b30dcc1bdc193ba09ef8b530aad. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:32:20Z), 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/QM4TW2581458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c114a51ae4588cb43b78dd784a6908387172fd288c9ec11b043fa22bd0bdda7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TX2578507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a7947e2bdce6f9977157d37b478c6be72e8991bd19066ca9036a3f62f1fa06. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM4TX2578551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf348bc13da30419953ea3cfa2b6957fe7fb2766e99878462515ec9a2344ee9a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM4TX2578552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd313bc80b0dfe3bfce6ff69538410f2b90ec3fd16110baae4d2c98651b2aaa. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QM4TX2578553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c114a51ae4588cb43b78dd784a6908387172fd288c9ec11b043fa22bd0bdda7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM4TX2578507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293ff7118cdebd45e6edf3a16d3bf9362cf66b30dcc1bdc193ba09ef8b530aad. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QM4TW2581458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aa49afd0b53f406479f987c8c9eabd177956fafec1b293edb04c5a9a770613. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:06:00Z), 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/QM4TW2581457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4110267fea06928c5714271c24bc280677a8fa81f251f3660047fada54df8c9e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX2578557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21fb8fb6cdaea7a42c4cd1cd2a22d41ae6fedc90adc7cf708b783ce4b63b73. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:31:13Z), 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/QM4TX2578558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8783d386559711bd29109fdbeedd24067e65b242001a5b083508e35651f2a314. 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/QM4TX2578559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efeb75df09f51c4c0de4cf483e36e2a37c9367d4a09b9a12a84878d6985d68e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM4TX2578560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf03d67850084f4a1113cc9a035c53445137823e8c0e2402151202e7e6aaced6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2578562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dead836a309b54c5e440b53e276935faa80e638240e008285e2d8fee2267cad. 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/ES40B2200007.