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 0x3bcececf127876fd4488a3c1510a778363832fd32a4f2ceba5a0e7609ee8fde5. 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/3ac7700c-f9e8-47f1-a38e-9d076739e3fa.json and https://artists.proofprofile.net/proofs/artist/3ac7700c-f9e8-47f1-a38e-9d076739e3fa.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 0xdf06249394a55a741f4e085f79c2e4016a4a753d8dd1b9156fb7f2e4e3747106. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA62082969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55017c116a11da6d9602be746b7e6afcbef671b8a9e8466df470c9784a7bc2d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA62082979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd2716d72490a32a42e34ed6eec7785e7072dd2c2cce906342874accd821708. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ZAYVK2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d6d226119ce4fc513d3e522adf74dddaee7d8a52ca143e80efb76c57ddc763. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAYVK2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9987c1a2564006c70cf6ae0d766294c00f1dd47be7c2d6c07bba3cb96b534ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAYVK2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0586f11caffc93728d776717a4f28eea5c88063d9e124db176445f58019be53. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ZAYVK2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71def6abfc5c0f5af6d320074236d72c1d4b86b1c896e987ebce551f2ddaaa9d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAYVK2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ea96a9d834db6e3ae18ea0d40c152d589994132fa6a574f20f7843228e105f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ZAYVK2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8306cbfb3c2e5b017e508a7e33f70df475fd8749778411d0673a58962c6f2ad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA52479857.
heaveN caN waiT: thE narroW dooR (vol. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70516f81b745f99278e23069e0d7939824fe49966c32ef5d9b8cf2e9a9e26756. 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/US23A1542527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6992daac78abf01648f47dd568c2b3030c156e0dd885c9c951e2bcd8831c84e. 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/QZMER2371781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8158885a7fa4172b4b3fa749eaa16edb09a88afb3a8914d95e40735adff4a598. 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/QZMER2371782.
Vula Inhliziyo (feat. ThandoNje & Smilo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ce1b2746e8aaaa824b2034806e404c7f8bd78076d74f217585e36c0641a4fd. 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/ZA56E2416481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38208cdf65dd518b9aa552e15f331df456fffb651b4d7f1968c4bd550f09b277. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBMA21874492.