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 0x7e01e90a10e1be7c922d99ef39b98ae7a44473bc8a10107c79b336734284a836. 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/2b111ffb-cdf8-46d5-80f9-8ef3ae97e62e.json and https://artists.proofprofile.net/proofs/artist/2b111ffb-cdf8-46d5-80f9-8ef3ae97e62e.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 0x7fd68293f064182b307213039ddeb2aa2e8f7cacc296e8a0ea6436239a93d5cd. 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/TCJPA2493100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109620a77eea1d04142b8c130ed6e87efeda9383af0d19022b8d9fffba7c251a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCJPA2493102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a742c89158814bd8d7a610f5d286ca78a3a9fc7abfdf01dd8de25d80039f84. 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/JPB602304738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b76ddcd447c539eb73f9031cb9f0f86652eaab85cee00002c383974650df0e. 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/JPZ922202424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d351816dfffcf08344491067abc3f64e10d4096074147d94c4f03e0f94f8f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCJPU2210640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63b8c529f5ec127180f83d25fca56022a58b1999d39a11f6554a7b2c71aeaaf. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCJPR2246077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd3561f77eb04e35c5a30014fd4bb8194d90d458e21b7611e711aa9bfbd84fc. 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/USUM72024063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5577087cc3beaa0f0f8f36f26e5bd66fbc6b53e564adf4ccfdda2acf577532. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCJPX2348228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3df12b8d83eb08ddf55a039c4255bb98106bd3930fb25eac2fe65e857210173. 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/TCJPZ2456922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac188e76531719728021d49b92bdb82e159c545fb38f7ea4582411a87a5157b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCJPO2154364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835ce182794e42e2a933dd8da1eb940b7144deb0d1af2415f61a012189f22f1c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCJPM2078235.
Can u feel my heart (feat. Punipuni Denki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc513a6a340d128099b051966cce4b1c32f574d545fe19b04c45916890bc12e7a. 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/TCJPJ1946897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1c8737ee0c07871d556044527e888dfdd8ac34e5071bbb1ef199686cd4bc5c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPL2027782.
Believe In The Future (feat. Punipuni Denki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265c88a5339ae14ba1b3d6a4d49348fcce20f67f8af3c540c4edd6df76339870. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCJPJ1989023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cd5f5d35d9e67872386ea887f1378465246dd2da9575eb413b32d5cfa3139b. 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/TCJPJ1989966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d91a6023214bf232f2c54fb653a8de0097ca2f7b1ebe5cdcb242eea20aafb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPO2198627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a4b9bc1ade927d924d37b09141a84e58ad7e555dd398509b049dd34a2dcb4c. 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/TCJPI1999317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a531721418eb5450a29763fe55a7730a0b930c11658aa0aa201d09f661907c. 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/JPVI02002503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f51a63253b52ce6578b577e4b8f99a6ed98b672fd8f2e588e8ee025d960088. 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/JPVI02002505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e6bd2731d2e3714d0b13b213b8b250cf5d3c0b11307a3611eb928d5b3074c. 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/TCJPK2098817.