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 0x7024b0c51b4ed30c12652265c78906e47cf1ce3fe555c5ba86d39910ece91386. 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/0dc2cd84-a19d-4d9a-93e7-1f0b3dddeda9.json and https://artists.proofprofile.net/proofs/artist/0dc2cd84-a19d-4d9a-93e7-1f0b3dddeda9.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 0xa8d1add0eef53db31b9bd53a17086ba24f5ae6e2fc9a8b095f7d67648e8e7361. 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/QZTAW2474441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59100296b13839241727aa674699a29782f8726b4882d568f6453acd1e7c883. 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/QZMEM2280658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4646e6e44435a86d22482d5928f7e7bd4131e733615086c4a2d3e67995246b0. 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/NLFL72300540.
BACK TO THE OLDSCHOOL (feat. The Sickest Squad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797a18b938afb38a46808f03fea6daf164434763d6a132719b4026a16e9c0522. 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/ITUVE2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5403693203cfc53fc8e154a1dc26cec5dab3e0a5e01c90a71575575238394d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ITUVE2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd9a112487f004bbabb2f1070868a8d3b621c8df47c16095cc63b353c582a32. 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/GBKQU2027621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b77ccd487b29a5c49624b7645fc3e3a701601f160f902d1548102022b3748db. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITD131700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb901c7ef41bdd90938f8ef7377d33d878950ef6ce3e3e576d472acc0fd097480. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAIN2435243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f16dedfff2f4f91fd0a4ca5aac9d836dc6a230329c228dc3b85d78e3513fb46. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6G2473523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f16fa9376ab0712c771143594029a984db13c9e73c501c2cce0659115ffc597. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6N2417149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b52c75b1a4c05ca6e5d0d24f872ba367f9f57b5c83f6ad43f4f42e9f16f33d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZK6N2417150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd026b6cab80a5fa7d0dc7927e0a63a0be1444d216567c05fffcfafb77d1de3e. 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/QZHNA2416351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8860430205d985f4bd7dd92f84d974742a9df2eb575fedeba3080b3681d498. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ62460595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041d14df834850d21a2e62b93bc3aaf5784b7560bcc77f8bd6a46e0aaabe333c. 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/QZWFM2367052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832e641ac0eac21fd5679126962e561f728583523eeeba26dd30cfc6d868a81f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFE2329138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91287fc794fabaeaabe7d7614e55cd9a5ce83a68e70cb2043f6cafb7ab47cd9b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLFL72300875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811c335f63528702474e7caf508a1d2a40eab22dfe98f896a2694c4c3ca6e0e. 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/NLFL72300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4646e6e44435a86d22482d5928f7e7bd4131e733615086c4a2d3e67995246b0. 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/NLFL72300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740860636118464f0a746b92455f3ab275b278fc38da18013118c41ebfd93715. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATR981291563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5234ce12c1e3def78f03a46b14f77678db1c18fb363d5d043bdb8d04a33bcc91. 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/NLFL72300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe491f46791aba1890f6df3b5285825f9627cc94dc481ca6f2834e8942526ab3. 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/NLFL72300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4671cc5eca96aba0c825f86bd69e31f94e545e6165d0041940b473f5fea3409. 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/NLRD52264081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda208cd2234ed76a3ee45e81c46ac97bdc6f64d8e9635d1daf63a4591f2047cb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:26Z), 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/BEB682200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e52643258a5e9bb8ab8a456f70e88969db7d80c7014f0f14cab189ddc3ac8e. 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/QZTAY2271059.