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 0xccdf1b58bac914a786bc6476d7731d87519c83d56fcb2d3409f76ad4becf637b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad6f7d60-72e5-48d4-ae7b-abe42ee8ffc7.json and https://artists.proofprofile.net/proofs/artist/ad6f7d60-72e5-48d4-ae7b-abe42ee8ffc7.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 0xbca7528724720f76e8bb7cc66d765d679738a2b350b8e0d7a069bc659b9881d9. 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/ZAC012300629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b36ca9da77a53698914c5b661dbcfd1c75770fb79ca5f65454c2348d4b385d. 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/ZAC012300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4825e554fd57d44d787287ec9e7356b9fb41e0e3a660059557b8d52a5dadb108. 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/ZAC012300631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bb309a8881c464674b3527157148620afdb8ef80edcb1c105bb1c1b40dfd28. 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/ZAC012300632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda103e66cb38ca07d3e334296fd1076230d5b4ce032077ac07bfdaa23a74c1dd. 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/ZAC012300633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdda2daa32108f55a7df67abbc83dbaa89265f8f8f6fab06fb8ba758097ea35. 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/ZAC012300634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcfe3e6c99cec7b93516f0cf6a4f422347125566d069d2b5c85d7f15c44bb7a. 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/ZAC012300635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66da7c8b12a17553f036d9ca07282092115be607ae6a5f3401400a01f8dcd484. 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/ZAC012300636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbba2d9e809e6cf892e5f7f9471022ec91e18b87ff8048a7f6632df476eaf709. 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/ZAC012300637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b1bc59d53a32dedb883d0f2db950f22108d93cac235ab2d78faed669444d4c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZAC012300638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeb32f4a49d12d0352be6f2e9a45017b86f6498e075d8aa5778d21150564c71. 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/ZAC012300580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac3376b5dedaf3bd4fed25eebcde82a78af4efc52ea78fc72080ffd4ae8dcb2. 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/ZAC012300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f3db224e08744660d3c851d7ff7ab4363ed34aabf4f21b2941a506fb29d371. 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/ZAC012300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a233a43135f20bb0e8068873e518c2cbc65d8e4a7606fd593e205f20f56b8c. 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/ZAC012300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5533eb07768c9b214d7171e021e8248d0909812cbbaef955572b97d50a5d95. 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/ZAC012300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dbde4e4a29b78a9dcb12859b9b5680d319c895a81d057e9822ec188dbf2c75. 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/ZAC012300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eab954462d52f3320867c307addfca2f017548fe44df5b7dbddc8f46a68aff0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAC012300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcad810274497a670b2a2f31d456c678902bddbf9e29a4ec29ff60f1cd0ca1c. 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/ZAC012300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28171c6d617b62fd968bd8dd3022ed88e874020792885a5a770befe97aed090. 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/ZAC012300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63604e3e747eda2b26ca4dcdc509541e6cd19b7504222d0779a9781ac959277. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ZAC012300324.
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 0x2b9e74cffb2a6ab55897e03d18b7561d64c667b0993ed25b3396fd57959a7450. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ZAC012300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62363e66f5fca6a225ceea4553171e5cc620b5b31d419377a51608e4f637724. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZAC012300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61682bbebb02845228beb2dae946c676068dff71a0ebb9e5fe79defb27a40cdf. 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/ZAC012300332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7254f1b686faf306f956d8c106a3367b4828c66003a1fa8ad2b28af896f268fd. 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/ZAA012300246.
Isbuselo (feat. Mashudu and Royal MusiQ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423e83e38323479999aad9adcab7b5df360b635d63a091a98f67256df4589486. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/ZA56E2200392.