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 0xe455daa8527beec5b00097ff8cd3180ec07f94cfd1eae02260971f468e797090. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29219180-15fb-4c3d-8299-5899cd161c28.json and https://artists.proofprofile.net/proofs/artist/29219180-15fb-4c3d-8299-5899cd161c28.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 0x68dec8d2b4793c325c83d7761114c5ba6d7022dcbac3f1e621953c8573714339. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:55:52Z), 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/USHM91857264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc22bb120a7a78898692364b85c99e28a5ef241e718eb18a6b493a8a3fffd6c7. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/USHM91857265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f89d692b8fd04c6bf209aee37c9411b1024c2df6adfda94e5278ea3aeac5ec. 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/CZA232300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28cbfe1b2c8f3c26df7a82e641f6356fc6749cdfa4880c34dd2a727dbc49e54. 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/CZA232300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fafe22d6925482e8b0e7d4ed49ac9f59354794267a215b38768fff8c8a8353e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb17655c27f97863421ab665593c022ed5897638c054fc5760c3a0fbeaf9caf1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d9ff708b9a1b752f2bd76d5f8e3ff61b22f964c8836e7298c778f47574df2c. 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/CZA232300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29501184f2dd76a8e0f274ce314dd479acc962c4204081b514ff0265505a16dd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd5844fc59ad8b3c7c2e89d8a70c3ca2855926171df0c3d442a43ce734c32a1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b1a249751ebf7689ff850e4aa7c8b01b251935b669fa4945c22358279498f1. 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/CZA232300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88569327411f5ea1c782a47d207bf013c30595d811282eb1c5f697565653facf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CZA232300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d678737776c752deee3293494e96e6af690a86d3be72278b911a59f9551cef. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CZA232300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa762d87cc07083b3e3898d95a0ba0fa964f048b2d1ff7a03849595ba6321d42c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4548ef4f8566d1fca4081ccb316f8b9c3f07ed56696f1400f9357ec4f45d1ec3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZA232300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e874c9174931c3ed2c2bb193af1544e86f4e4ff29d79ae131e58bfa87251d0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CZA232300214.
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 0x94d43d6cd3b4e841b370b8dce0543c86790a0e4ec107abd05048dd9b47bcce43. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CZA232300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf1824aa51394b09f40f52d1fd38d7dc5fb4e64c3739da178c82392978a7cd6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CZA232300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef283a40f50174581174b985ba9215b33b0e0b8f4f3e67b2c271d15ca023267. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA232300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dba983ce40e6587e99dc00d64736f8b47a4bfcea4392afb91d74809aafe1afc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA232300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad91235704f203e50c499081367b05c52760cd4cb7bd8c57c4f909da858fd494. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CZA232300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91918ab6587a6797032d80515590118d6806d80c65b9bbe06aaf02ecd0bde82. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CZA232300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3e85e6cf7d1a13cbb53215ab2ffadfeb91bce2ac67f9c1b039845981525e49. 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/CZA232300270.