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 0xcba7532995123ae91677ffd3ac501ccff6e93b56caa76424ef67934f32a7b604. 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/7959e640-84f2-4cd2-a49c-dd73aecdc448.json and https://artists.proofprofile.net/proofs/artist/7959e640-84f2-4cd2-a49c-dd73aecdc448.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 0x4482ea44384deca2547824f84b46167bb57c1ffaabfbc254b436d582bd263a98. 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/AUFXV1800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806b74552026b177734dd2dab347fec32104752593b06b940a949b589849935f. 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/GBKQU2120379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb628c89457f06ad99a6f35bcce855bfee9fe5093bd60e27f7c9605714dee93ef. 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/NLM5S2101176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde1a393e4aa09827dd8ce228972fe0a35c85c71fb3a6931b40f9ac448e1d6ac. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLM5S2101177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6194908f20413f3b134d95a371e6110849aa995ac1348ed44ec55f1d0aa68841. 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/USA2P2100849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0d0ec9af071f140e623e445e309f4dad5508b538db374afcad8285013409ee. 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/GBKPL2015803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91960adb7d49438e1944f574e20193de343795dce5ee432cc9b567f11b05837a. 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/GBKPL2015804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d0538abe245b268c6e41944e861c4a2d91caed447e806e289ba9c436b40b6. 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/SEVWR2003601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751a72762fb58909508d84dd877a0366c5d0be7d8b7d7bb5a4fc5938411db6af. 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/GBWUL2068503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72be72202125cb0a7227a95ddf4957671cfd967693f19ff07e8a0cb02c3efd0f. 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/NLS3R1800294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa989f3c9d4a42cee933216bfcc41f83d9e293da36bdc0c32b0e30a558ac82. 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/NLS3R1800264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4963eefb061323f3aa15e5eb35195a381e340b634f7d4fa48631f06298625c48. 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/GBSMU6298642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd649c487087eaa3e69fd661645bf6899697c1cc106eba41947737037d421ec82. 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/QM6MZ1896312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7473bc7761496abc8c86e7951078fdc5e63f4997cf3e9b914d944f0167adbfe2. 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/AUFXV1900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0a2f2f09b2eef0c4f021b086e36fea8a4051a9a444c2d072d0001c16ffbe04. 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/AUFXV1900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354ae087fab51a58d77ac9a9f0cbb8a75ad4720faff34f3ddd374fa5a97e00fb. 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/AUFXV1900094.
Martin Garrix presents STMPD RCRDS Vol. 004
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb628c89457f06ad99a6f35bcce855bfee9fe5093bd60e27f7c9605714dee93ef. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLM5S2101176.