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 0xfc102344a0342d14ea6cb02c1a481228077aa17e77acc3bde82cbbf12a69153b. 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/e2f19dc3-dc79-4e81-a293-4dcdca36ec91.json and https://artists.proofprofile.net/proofs/artist/e2f19dc3-dc79-4e81-a293-4dcdca36ec91.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 0xae1b393bb2589aec6d02356ae415d9314af6ef36438f6caad3b844e20d807974. 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/ZAC012400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121f68dba7aded56ef792669e292075aaf8843ff1f405fc5c4f260fd497084bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAC012400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd31cbb47988a6ec3fcf96766f46421b7bb244cb1b9044edeab08d8ab991d861. 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/ZAC012400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb172198db980585422bdd77bd1940fc39d6482ba1b41a36e9290a534fac29984. 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/ZA34K2301514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f16d7cd3146ff6fbf97aae34073e93678d29e794e34e33ccd2f962c6b5f941. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA34K2301374.
Emathandweni (feat. Thalitha & Dj Jim MasterShine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd60b50f596298fa0859817191430c9cb042c25dbe50d2accb9c89992c1d3e75. 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/ZA34K2301373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edcc2d8d87d47d7d6af9e6b6942f6f2900eb34fd8fd2f308f4646aab87beae2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZA7DQ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0f7d08d8a43253ae2dd4df8496f24957ca9767196d835c349f5465bfeb8f3. 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/ZA56E2200932.
SHWELE (feat. Oshn Ndoni & Jim Mastershine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4a7b60960033ff5ad7455a11769cd07b0e14bed70f66cc633bed2df831bc91. 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/ZA56E2201139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a628835aafd48ce4ad55345efc057d7484ead3592863f1c0ee47c4d0a1bbe60. 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/ZA56E2201140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5bafdc7526265910f2e89506ce4a8559090c750a7b5f98ff5be485fac4b887. 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/ZA56E2201141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1cfa41a9a5547801de6606ac06b5dd20a7f27cee60560e006e086f52217e8d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ZA56E2201142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0f7d08d8a43253ae2dd4df8496f24957ca9767196d835c349f5465bfeb8f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA56E2200932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90afb5083474d0c2338ce6d07b1c0cab379e74862e7e808e7d37d7f9cc97a45. 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/ZAUM72201590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46f16d36c06e1e9ae4f00c7f23a37242cd0ad9a3a1aba526ada1cd5d9ef982a. 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/ZAUM72101073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4af66231f31f47a054c8a8f3f4f7e788a90897c600e9439a6d1b448f70762d. 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/ZAA012000453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9829fbf9b4a942fbf0e1348050227ac609c78a573d8df5c2acc49f38e75e437f. 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/ZAA012100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bc89206f7f2a18cb2fdf8dec98708678093ac5c518a68eebdf7d04cb389113. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAA012000078.
Tsa Tsa (feat. Indlovukazi & Prince Kaybee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c6903f91d46d9a5ab80b133618279d5340ac376fae15575ff6e90a6969acfe. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ZAA011900216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743f38a91d79bea16d7e1d65c28ca33a89d672fa49f6f5393efe388351ef6ff4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR1934706.