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 0xd9352688536baae76b1fbe3779072a569f4770ffecb538ea4022ab1b1daea102. 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/31d0d7d0-b9c4-4456-bf9b-810be71395bf.json and https://artists.proofprofile.net/proofs/artist/31d0d7d0-b9c4-4456-bf9b-810be71395bf.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 0xd5133a04d88c9a14c29c02dcb58d90d034ec428daa85c0281a1375ddaf76420a. 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/GBLFP2359291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d8a8a3c0c363f7fd6db7576cdcd9236c08ff5920bf764ef750073bf969808c. 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/ZB1OS2500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3608865f340bc22ab2e2ff1328c97d0563aa469b24bda3c2e10a221a4f6b6e. 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/ZB1OS2500513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd4635272e5dbe9dac52a28c4cf0cde1b9653d9824fd7b076bc779d6876d72. 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/ZA56E2529191.
Jika Majika (feat. Mr Nation Thingz & Ceeka RSA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb386427c17acbeeb5d182da41f21732040eea6e0ba0c179aeb049e4e8851a3a. 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/ZB1OS2300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0947ffe8fe73a14c5c3b5a951e925d20e97338f64dbb15e1965946417f12366. 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/ZB1OS2300247.
Ama Groetman (feat. Sbuda Maleather, Ice Beats Slide, Thuto The Human & Cuba Beats)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5c0d974fd13f896b61bc0c8ecf14d622ad903866079f504509f988ee8aaa2e. 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/ZB1OS2300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa336032f6f39681d23a9e51275466cf33bf28fea489e9de7a7dec4390e87ca95. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USA2P2423832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8c8dbae7b3b9729eeb6d1b194fe4273074c91ed9351d7c15709404c53696d0. 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/ZBQCA2300020.
Alibongwe (feat. Lastborn Diroba, Tman Xpress, Al Xapo, Cuba Beats, Snenaah & Ceeka RSA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11db8eef7a6757d0b3c89b8dd5bd7fab77acbfb1ed6d79c5c052efbb9e409be. 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/ZB1OS2400391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd850ce44441a0b064dfce77235d7f368474a02a3c2bebd14cd1aea007bd3a4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ZB1OS2400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39972f6177f81380b760a82683f5ebbfa1d6bd69be5646abb42fc25081208258. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ZAC012401789.
Khona o Kuzayo (feat. Katarina RSA & Meez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037318a402bc10f6e29ef1a71d44201e3652be54cb25bc992f3078123793d847. 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/ZB1OS2500561.