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 0x7785d1d3d24aca911315924c1265fbcb57592f54fe64936b7d0044545f6c8459. 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/386659c9-94e3-4ea3-865c-9e9591db7b50.json and https://artists.proofprofile.net/proofs/artist/386659c9-94e3-4ea3-865c-9e9591db7b50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Instrumentalia Keroncong Abadi Dalam Flute
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 0x6ab6f7a83db6fb80923b5b584bcc6003b1b5649472158bfedd7b7b25f3e256e5. 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/IDA130905401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d50a92544f8310713a5fbcd07061a834937619351c082ca1c34ed92fc15405. 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/IDA130905402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300a4c2e41983f0ead87f75652db3865157274f61680995cce245d5ddf3f201c. 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/IDA130905403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046e31cb27516e900b081deb5df9f1a09e2831deb6c168659e87e9fc73da1ead. 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/IDA130905405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fa4a4f1900ccf238d1b570c789f6d7f8350cb4bb773c488896091d5013192f. 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/IDA130905406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835c07494419f0f86a957f267b381df3066d5467da26068cd119c7236f4bd975. 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/IDA130905407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57de7f4eaa26bb29defede2f7c2aced79c0fbc7713a7171e88c43b2da8d49ebb. 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/IDA130905409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efb951271013f68c17e487aea502c8a3e9b63b8e0da802f244b7e18bd5470eb. 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/IDA130905410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919b8f29152062630ed948d0bb1434a5904429482da875752dc8543a45767b64. 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/IDA130905411.
Instrumentalia Keroncong Abadi Dalam Biola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee96cbd98e614cacfed33fe58a02129ec2de157937a1ef704e3e4f685cf1c9e. 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/IDA130905301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd387c79ac72ddbe393e016cc940482673f4deb4b8f332b77875ea4cba0a7d2b7. 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/IDA130905302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9391943fc66badf5c1d9dc09ab59615bb13f682de319286cd13e818d160862. 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/IDA130905303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6357e9c55b45a3b1a93135d37cbf556a69444cbb0bfb35d4294cf1a742eaa8ef. 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/IDA130905304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af3f470a27669d491373e8b20a1864d9503b4afdd7ffc85b59e4d72ab9779d7. 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/IDA130905305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a34aafde055b205c5fcc6278e507bae26019e5281db282bfe475969738d479b. 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/IDA130905306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28683841621239600f8909451d7fd356fb2bbe4eeb80b33817c0680330490925. 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/IDA130905307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1d469e9b106611e4a8dbabf880811cae16ee6ca245478dec7f07059847bc4b. 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/IDA130905308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b479277ee534272c4580ddaab6c70027647384c5dcace212a28778e192546ba. 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/IDA130905309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1458568f07f0bed6b8b10c1dcc2f750bdcf7cf87946407c2ab8956a650c011e8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/IDA130905310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6e406ec7dfc0d1165be7d42d65797d6affedd99ab0794440bdc2aa11c405e2. 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/IDA130905311.