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 0x20a9c1c2e8d2111896e1439ace9347ffe86d1e0a73c6992b1d21ac4015bc6866. 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/3f0a2547-0716-4156-90cd-0aac0ef385d8.json and https://artists.proofprofile.net/proofs/artist/3f0a2547-0716-4156-90cd-0aac0ef385d8.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 0x5f239cde40b1ad3c0924bd7616bc051d8b614d4a876619040ac192d2ba8a461b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:02:18Z), 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/NLYJ91700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe480d4e3c9f07db80e669436b43894b500f0396ddcbd3226d1b646042109ac9f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLYJ91700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853a092a5a72a5d814e571b703916801e507a851f1074f30bc39a53fa132938e. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/NLYJ91700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a277e7904adc2de4168621b1ab6612818a7f23e4384d54444d318135578f92. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/US25L1900412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61625917e85ffb440295dd0a6ec72c7e1520b36a6e54cda163a732b4e0c1eec9. 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/US25L1900414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb64271544e3b1c4420788454fce3924356e55bdc22c9faf9de59174afe670e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:51Z), 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/US25L1900416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61502eaf1ce4859b20d93e7244e004fea979679c439bad4c2b04e81468a476f3. 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/US25L2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b9789cf9bf32dd1f453da1fd9f0ae7b557156061d47991a0c163ebf537f499. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:47:51Z), 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/US25L2000378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8540e157c82af95290feedc561667099ffdeea014ed533294d5e5907174076d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/US25L2101649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb76117504d81c4c4286a62186aa31109ddb32a20156cc9f566f005f57c323b0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZGXC2300408.
God regeert in dit huis (De Amen Sessies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2494cda32ab23176d1a9709788c388cbb0a9289098336790374c62f1afda91. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:54Z), 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/QZGXC2400391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f622f14f38a9ce29dd281a91dc56ffe84f76a0a5be3b503408def444cc8a658. 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/QZGXC2400394.
Uw liefde is mijn houvast - De Amen Sessies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa283792101fa964c266136804d56b089b3a7610950652ccbccfcb62bd02b4583. 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/QZGXC2400393.
Vul dit huis met Uw glorie - De Amen Sessies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f2e1a5d7394b267e09bf145de5c07669bf1e55c15a87c9951837d9d8ece821. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZGXC2400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec0963dca9ece2d6f8f582ab92c32ffd94c459629ce7e5a42361066b465dabf. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:33Z), 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/QZGXC2400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a622bdb833a60d44b3037dc199690ad687438e501bf33f9664dce70c0cbf71. 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/US25L1500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f14f0bf0fd39a9ec683fd2b5b9fb44c5e5d35c44837102f4b5fc7c341aa636. 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/US25L1900330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c5e0c5e629294f5f8a563ff5636da07d185a86e09da91b4e2cdfc494be51ba. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/US25L1500202.
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