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 0x17bda3114545a72805b15533cc84ef5c6ab7243e8a59b635504332615dcf9729. 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/382f398c-6f17-4b5f-a3e3-81a7b897df70.json and https://artists.proofprofile.net/proofs/artist/382f398c-6f17-4b5f-a3e3-81a7b897df70.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 0x7c96a2582f7c706c4d7015c8b163bd1292dcc585eb7e9d98a49b33936b6227ae. 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/IDA130932704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7d4c3b6d8558082ab7eea6c1422ff66be1c8ab2654a0792c0a11075ba8dc1c. 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/IDA130932707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad25c249ee2620ca88c508b9104da4a5bc113e8557804b6572a9973eaa022e6f. 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/IDA130932710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ddb7967729f481869753752ad837620a277b873ad5168a5e55704b116628c. 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/IDA130932712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04507dd381b9e5784333f6b4eacdbb90949c949af185113b699a2aca5de1dc7b. 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/IDA130918407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755d721a55a7981c78f92ba21f0b9fc9fe98c8e8027f623c3a8b2471a598eeb6. 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/IDA130918411.
Instrumentalia Indonesian Bamboo Music: Angklung, Pt. 4
Instrumentalia Indonesian Bamboo Music: Angklung, Pt. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda962c882fd529162185fd7d0d64b9d3e676dda459b171cf561e7aaafa18210. 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/IDA130924902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaa3b9eb3bb76c3c3f093a36535b838067079d56418be963e3500eca468a562. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/IDA130924916.
Instrumentalia Indonesian Bamboo Music: Angklung, Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c4df81757c66417d8b0f8d6bd558b12a4ff56183467c40ca58dc8471b531fa. 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/IDA130924701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db862bb0e9f540314e9d0b7d63d6e6d3ffa60a1c114bb2afd0d38c2a75f1b0a. 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/IDA130924702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d159f432f13ab4adaa2e9a0f4d091bb316618cd53259d041cb5125abb5dfbf. 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/IDA130924704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd601381461826e96144a4918548db79952548a9b65579f279ff58ff4a8c58e26. 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/IDA130924707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043aa8c228f8401a78f57a8b225528b7d466b0e28c196d569fad7b793b5be285. 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/IDA130924711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d179c69c340ba7bac738052f706a6a10c9be3d9d2a70be8350dcd2e175c7efb. 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/IDA130924712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca797d1527ac8d4e0b07420a8a37fd5d89c721da91dbe3620172cd16a77440a3. 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/IDA130924713.
Instrumentalia Indonesian Bamboo Music: Angklung, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d905eb16b0ec641e83faa4e395126eb1001a92e37946780d7a77ff60ad0608. 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/IDA130924601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b1938476caeb43173c5ad02a95fc7539b4cc8e04120afb61cba82878a1e4ec. 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/IDA130924602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d9291ce5001e776d93752730afcc3b70e282612003cd4705084f826d7e449. 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/IDA130924604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ecf5c194ce0819089ae2a9d835edd4e50caada7af24665e848ade3072656de. 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/IDA130924605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24272e0eb6ec830608bed48836b2adbbca03c174e974cc3ac9a99df29da6ab16. 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/IDA130924606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f84cdd5fdd8b4348d67fa98ce03aad7c8158fb9c84aeb869867904c0917f71. 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/IDA130924607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f25525d294003890c692797dd3e8b4ed9e9640eec0ca6c8dba06ca2ddc0fbe. 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/IDA130924608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bc2c5a7dde7e35ea4a98bb8c8795edf1d583a859c8b2b0d67b8c58b0dc39ee. 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/IDA130924609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d170ae6de424593359c8f45c3b9a8ae3c1965d8ddf6e707fda54be7f93d56e. 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/IDA130924610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b44d3bb5e9379f52680499657fe64404b8804ce0649720f3fdadbf574c84342. 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/IDA130924611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403dc0695551e17a1aae29444588209263f636f43ff3d5a2fa2e1c5a2759a805. 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/IDA130924612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f763a657dcbe1ec6449d3ac9b48ca9cece40d9705c8544b596450451db5919. 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/IDA130924613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c64c2a6cfd48c4a104ecd84dbb2b6c6adbfe48d26e72822612cc1a8875e9677. 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/IDA130919802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020130d8a4eef2acfe20a485d723cf300cb345dfbb5b7354e78d4f601ec768e. 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/IDA130919803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844351beeafbed962bf7c021554a9aff5f23f2aebef96a0be30788b288e1ae8. 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/IDA130919804.
Windows of Indonesian Music, Pt. 2 (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f337a10f4c23f2af456b5e95555d36134d686776a909d5c282ee00bed68819. 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/IDA130913804.
Medley: Surilang / Kicir-Kicir / Jali-Jali - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6dcdb0221ddbb43d4c5a68819efa6ac62794b406f5f06a28d47a2c2f3d4efe. 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/IDA130913807.