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 0xed8851ae6706b78e44ae9f1d68120544374d9446b2eb87d391b804bbae50d582. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f29da40f-e89b-4c06-a546-254da4ccec44.json and https://artists.proofprofile.net/proofs/artist/f29da40f-e89b-4c06-a546-254da4ccec44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gamelan Degung - Classical Music Of Sunda, West Java
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 0x13cd3d8055b0e59c8aad2d479ff63cbda534d5918b38a29f7cc9aefea5733fe0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLC199600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361856c8586fa8363054bbe17ae4add6670887dda0c66be6910b14ed011564c1. 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/NLC199600296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2acf0958dfc166b0063c3fbc18df0620fbc3edee93b984da2cad4bda2843b1c. 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/NLC199600297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee78aa1be93393aa5241ec918116e0200f86530c5550c2f3fb66942d6f027c5f. 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/NLC199600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecf0f7c1470e825779c233cb6bcd240debc668c0e0256df963cb0f43cd71d34. 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/NLC199600301.
Palsiun / Bungur - Kembang Bungur / Reumbeuy Bandung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7587da5bd0a09867ecd51a16387973389157cb1fcd1082aab39adf3f86c6a025. 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/NLC199600298.
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 0xbd3fad19f2a2918c6a3a635453b24bc7216a0f79d3a7b82d96e335f0d44678ba. 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/IDA238400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31a3ead7a28f99bd5338de0ba5761abb5ab392381ff76089593bad472bef511. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IDA238400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe730d210cb9c59cb8d0036e9e3e5931c52d3103feb5924ee0ef8662aaaf368ff. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IDA238400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cb9ac5f5274c23eb567339cd5678e9baa31dc4c25090b3a8fb02bfb76f16b2. 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/IDA238400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddeb92587bb18170c016c7ba66025a42f541a51e6b9b2ec1155b91918fa70ef. 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/IDA238400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adaab796b10ccaff916d5f73778f72aa8c5954d3204eaca86bc1f08e2a74b35. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/IDA238400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab10a9247e29ad7f5bf03ab86a680564fc87cc1e804def7fe95e370107cd22f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/IDA238300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a1bda78424630fef30bdf64a78bae6c95802b0f74564e470e5beaa251bac72. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IDA238300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2eefe98fabaa16226eb79b72f78c782dc59c3e081f043c03dc49aa1c0b20d7. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/IDA238300051.
Kulu - Kulu BEM naek Kulu - Kulu Gancang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f1d62c2d2002aa7ac7c3ec98d4023129fded18609aa93799c51e539e1d91b9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/IDA238300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61220c0201737d060f868a24cde16cc75204426d0b90419baa57e161b8cad1c1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/IDA238300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303af4402f5b7eb8a3dfedbfe719c45b41a76e525f53f167f95137f0e8856e8f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/IDA238300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c75a538f0e3d5a389d424c7b40a4bd53de9f34e9646f81744171a819511b32. 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/IDA237800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef72cd217eb28ef99f78c27111664923bec206bfff6280f0ec733ed61b1627d2. 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/TCAHO2350992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b53444247474a0954780360142275747be2964fc122a839bc731c841c553f1b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAHO2351085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ee621b20bdf0c86e3fa2962ece84ec0f47792ccbccb6addf6e94e3ef6246ea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAHO2351256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c58b60daf36761bb88c5f7eada105da568c198cad88137a8572655cc2e67a07. 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/IDA881914269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2083174bd6188498ccd7019db107f4aeda7f2b41f367c4d38dc2cb58ae2ba221. 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/IDA881914271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1f155958aa36479cc33cab1f6396b6966925f4dd4bdd2894afc6b548fdefd. 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/IDA881914268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fd5a8a382ad4a9647b53b3d7b6bcc34cf94234ae93aa07cbe6713a4b7550c6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/IDA881914270.