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 0xf83774748f140fd158d162c21655acfa633b4e9302f593f2e7d982136dcda3fd. 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/ac1a90bf-ffb2-4e8d-b9ac-d9855ce786c3.json and https://artists.proofprofile.net/proofs/artist/ac1a90bf-ffb2-4e8d-b9ac-d9855ce786c3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15699143faa06cd9053ecc45fead5d805799ba829b3dc8816b225b2234acaff7. 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/QZWFQ2376245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb21d62279d8aca66319321461fdec2d127af98ae6530ab447121106655227db. 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/QZK6L2375347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f955ee43511f455e40304c5dfd0207656e67c5beabcdaad557fae80be2fa2b. 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/QZHN82330757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556fec841480ed99ad36fccfa7d54049adf51cd7860b26d633b0a754d4364da4. 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/QZTB82275622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ddfd483dfc841977bcc30ec2b39a60c2eadca96aa9ed474d57da4199566410. 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/QZTAS2281491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2e60014627f4bda39c8b0bd30010b00f6c954fe9f47a427bfdd0fadac0ae14. 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/QZPLS2200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94c256dcf39e553dda6b1a71086ec288bb6f952c9e43d9340d12a78260f8e5f. 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/QZPLR2298814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ac13cc2edef9ec4fdde7f5e3b4f68fb132d98f96b7cdb6523c86e544295fcc. 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/QZPLR2299049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d649d7d3ad72ed2a1f289dbe93a8615ae58c65a9e2cf498503207f52caf4ff4. 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/QZPLS2200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fc6404f1f7ba71e485dfe9f641638b7a938227b8a44ca7927e70a84709d2a3. 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/QZPLS2243721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38175ed32000427dc26fc9712d4ecb143f63ae5b50e8febbf9af605ae54fcc03. 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/QZPLS2246112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c90f5eeb72609829c839045612369fed686b414daeb62005bfe692f04f53797. 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/QZFZ42246638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a30ffc0c5d053d9fb52095a7eef027cada67f7673e17e2b07a1b9d018f3a5. 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/QZMEM2145300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d308deb1473915aeffa890e888f4485ada0a40725e62ee4de73300ab8511f68. 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/QZK6H2104570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7dedbe78304432f425aec267c2af1cd2204e39768586941a0346684d2aab35. 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/QZK6H2132113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe017ea92396bcd470b33c2219e3686fdff90b1c80abab417a695796aaaceb55. 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/QZK6H2104572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab6e6c21f197c45bd584768a72da7cc0f0393ea1b4fcc3ef2959aa8048ceb88. 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/QZHN52087806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c23e3b0b67c36c8e6d889bba20f9c3d61b1c2a512cd459afca796c8a0173ae. 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/QZDA42228273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6e94dde35a321d1429b9d952322b23c1748fe54db55994860c0e822b4c7417. 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/QZDA42228274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8455c33d7b7e9f0365e665240737cde46ad6ecef52a27fa2b0426e387a2cf34d. 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/QZDA42228275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759c7e911d773b742d964f877d309bc5a8ec68b5cc3a3409afed6d926fb05d30. 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/SE6QE2476602.