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 0xab543008e915af7240e24182326f9d5287f712d2cf1c41558e1cd12f838cd9cd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85c265a4-0ec6-4964-a053-3c7e627d5ab3.json and https://artists.proofprofile.net/proofs/artist/85c265a4-0ec6-4964-a053-3c7e627d5ab3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sundanese Instrumental: Kacapi Suling Tembang Sunda
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 0x5cc30dd60df62fcae56ef2c04d2356fe05dc6786db15903a66310886fdd0b3f3. 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/IDA141402035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e275607de66b9fbf632b68994d2b4e3a5f164404a825fdbafcbb3d5979aae71. 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/IDA141402036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8840c94341f0bb4efe6363dade671c516e729f9af1cb38077ddcad9b03abb8eb. 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/IDA141402037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f996717f104b2ee7745c495604748caa160a995c8577a162a7373f0391b521. 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/IDA141402038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b75936e7fd3b5db2c2bb3daa13d9f0f915fa5d97bcf952be286799b9c5bea4c. 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/IDA141402039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519439a7b86287ea4825dc5ae17edc7d7dbe1baa3b9154454bffc1d383aadfe6. 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/IDA141402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90620f57fc460d8e69002125ff29c6cd7cf75194d2bc422be72e96b60cc63952. 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/IDA141402041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7464b9c853164878bf7928f2c830c7afacd1de888fd6ed1d4ec479757a4e509. 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/IDA141402042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ce4ecd0e702442f8c050975c92c3497b98cd8d3027d5b89fb83bb0b1a8c1d0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IDA141402044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b0de935391db37c9a171c85ff86cae338da745b2f2b132ba6995cdc5c7fb07. 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/IDA141402045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362e8b6ce6208078ee4cd4f626161c98817aa0adb79327f8a6610500a21896f3. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/IDA141402046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef2d88190295bb683f864b5cdb600f5ced36c1c5b0c941f8c5b6f2e13e9e292. 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/IDA141402043.
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
Sundanese Instrumental: Kacapi Suling Kawih Sunda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c40e1e6f7d9115ee587875bb9a480c91bbca67b024f6b4af0543536c4f1ed0b. 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/IDA141402047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a9133a1d341d7e6595d77d70658ba5439700736e8aa2a9eb00a82b142dde6. 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/IDA141402048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac637fd877dd68a56e67527f515ef11cdd1f392f5678b2e4e12738d07ffff4f. 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/IDA141402049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34203d760c36129916f843b14fc01367544f63a4ac5735eb7c1b2906b5293bc4. 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/IDA141402050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784b35cec9bb62d9d8653a3bfcfa6a0305c9c0050664959ecf430a0286aa8486. 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/IDA141402051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a97bc618d12b17c5e5db70a3cada442c2420c8b9fbd5bf28ceb5f017edca8db. 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/IDA141402052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f306bdaa474dfd142137bebd904a10833fb2f0bc93f3e9fbc68fd940ba283b9. 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/IDA141402053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfac6cc681cdd760962951ee868908567f6c5594d7a2179a0eaf902428800f18. 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/IDA141402054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175b202d24e9dfd219141e3eeac2b75f82157085b187790ddb8197f9204aae82. 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/IDA141402055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94817d67a6326e63ddb2b4339c404450674e721b905114680d9ced679ecc1d5. 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/IDA141402056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6286c79d0ae3b8f2d6433102a4b5b860096b4925dc8b5104a6e2a9edbdbae9. 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/IDA141402057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c16a967c00be8d149d225f74d69f5b55621caa1011055799d476bb0efe8897. 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/IDA141402058.