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 0x77a2e55f0910928b6cae262a710c869c307bfe19ee416aac12ff6144218e8ec5. 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/38a804fd-43ac-451b-9bd8-fe53376f84b4.json and https://artists.proofprofile.net/proofs/artist/38a804fd-43ac-451b-9bd8-fe53376f84b4.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 0xbc9377ae1f907e3412d576c75c32afacfe4beb6e8c5b716ba68a656b50eb5dd7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLV6L2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dc3517c3f7fa363954faf5f7ef07ace16eabd095f034f523287ae95149948b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6L2017384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba8e23d3d747be0bca1b59a36dc851d366f7fb6066947f212fbae0577e5e0d3. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:53:11Z), 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/QZNWQ2237294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8592bbf5640806f0265a09b095ca0eda7fb1cd34fe4bd30a992a997d4cab477e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:17Z), 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/NL7KR2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3ac7c28da829081422537a301b4533994f4e8825a2c869b6dad7a9ab35259. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:11:58Z), 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/QZK6J2438114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec48ab4431a6b749ac36ddc18c363decb4728ad1ca4ca292f2c26f8a41a747e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWV2489638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd02c43533e18e671de44773d125e7157a956508e6f64d59a8ae61fd33fdc0d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLMM21700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecfd9e4c45c45367d18afd2cbd1fb9221acd7e80b9fd2d0db05aa9e741f1a1d. 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/NLG661701086.
Amsterdam Marrakech (feat. Ahmed Chawki & Soufiane Eddyani)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac447fd4bfef86946ce58e1be2e6346b2e08cd5c0326afb8996a2b65a6d22282. 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/NLV6L1800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2ad7610535a4c61d857deab0d9926dc1acd634d0a67b7083bf9f537ae826b6. 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/NLAM41900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc911b60ccb1b871f91889d69c0a7524869ffa40b08c84b955512306f0923dd8e. 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/NLAM41900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69c4a01d18ed886daa63ab7e14c1c557c4ff7bd27fb11ed62b6b1b61258f505. 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/GBSMU5434986.
Amsterdam Marrakech (feat. Ahmed Chawki & Soufiane Eddyani) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b41c67a85dbd44a41149100e57a06e404e6d37c22082269b54ccc2b7df00a33. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLV6L1800032.
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 0x85f49c55737e9ac4a74293bce8f2b9fdf6a3ba946107a16dd2e4effd970c547a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLV6L2000019.