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 0xed3675a841d0ab213e9e5c35a849034a6e1b2a543ee5b52fdbd1330d1a49f9df. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e187830d-0bea-4668-a726-78e673d149a9.json and https://artists.proofprofile.net/proofs/artist/e187830d-0bea-4668-a726-78e673d149a9.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 0x04d2954c906a4f29acdad9359f62610c5b1ab29c62ee53c267e6e911ba295938. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEQ021907193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd035f013d839b50aa959896a841f940bab29d451a41c225a37a3212fa1f2a24. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEQ021907194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386d441ad4f3056b50ea2ca2b348c27abbabfddeb05f4ebc2a2b4114e7e1f70a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEQ021907195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c32b474a6c9ac2e952afeef62eb1e40c4cc0db87273fe408b9b6c8ba3b8c82. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEQ021907199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f5461d51ace162c14deae22a3f39e35270840f56e6d48ef687573ee0ff5cde. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEQ021907200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59010d557b125b19e1975e511d6542412533a5467b09d954e3abbf60220e254b. 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/USL4Q1866475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee80ed93ebbbc4f0d123d883a0345b697772e165b1a102386349ebbdbd7bbf2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USL4Q1866476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8bf406c78b200c1321bdfa8a1b2751de32078fbb52059139d15f8ac1d1895e. 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/USL4Q1866477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b4575629899417a48a7bd10d8cc3ddd5ba32eda65a99d085aa7bd146a0e765. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USL4Q1866478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87832b75b24f80a24f2a90a5a52e57b23b78b59a00eb1205b104735c2540deae. 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/USL4Q1866479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658cc516d421408f6f2c43a914c013c958797b4af7b0420ff63e50cf45752af2. 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/USL4Q1866480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66da0c08b4dcfd8cda531220179c67f1bc2982025f60dea2ef990780476dd88f. 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/USL4Q1866481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1adbc7ba8dcfc36bc3d7dc8439e3a9605309c8d54d9f70defe5827cb7de238. 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/USL4Q1866482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b8ec8affc5a2bf00d00e21c11b64c85689acf4dfe2f063f3747a0f47ac091. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USL4Q1866483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3a7018370198c6746f9cca86f7bfe9514c0486f9184cea1ba9f2b4d6672052. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USL4Q1866484.
04 Days Out (Remix) [Instrumental] [Bonus Track]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c5c90a35a2eed55daf32013ccd9c9b6cafe74fc38b53ef43da871dc08764c1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USL4Q1866485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbde7590caf9973207683e7612bf50e793f5f94db4799d9df45988edb7116cb0. 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/QZNJV2435564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5b4add7839959fde32555c6c673ade29bcddc817004d5c5bc3397d5920ade5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHZ62230712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f7235e4f541e1ec4258a0b001f11f595e3e738d4583fe01fa23c81e2508b5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHZ52251031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1b0ce5005c6765f0a72fd0d602ec803a091ad72ac5def68b0afe5ee5b7e719. 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/QZGLS2060095.