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 0x452fd4f7f52062bddc6e134b91019ad50909e24f3fc7e73efd48347254339d94. 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/1a31319c-ca38-4c42-a304-75d9a6e21f59.json and https://artists.proofprofile.net/proofs/artist/1a31319c-ca38-4c42-a304-75d9a6e21f59.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 0xed558911dfc11b769672cd2361ac0a30d4e940395acf8e6fcee05e15a88c926a. 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/USCGH2254601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffdbad72da845328907b40a2678105ea27f810e7526a19c325dc452e6446e18. 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/USCGH2254602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead297409df33cbd63e2c12e39e0603edd5088c75d973e132a005c6d2f5aa95b. 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/USCGH2254603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7806e852cecee7a5f76028e0528db89d32efd9732821304736e6905b79144087. 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/USCGH2254606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089cbbd721f0c66682db411a4a75ea61513d38c45cbe9a137f028f6040cf1fef. 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/USCGH2254607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af8aeb1db2fd2132a674f5c22e35b3494756a63af33613cb2052220a4d4e20. 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/USCGH2254608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf882d96030e458386ca704e0826e3c3cc7f0c322963b62a8e1a47b8e03528182. 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/USCGH2254609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174af3446f4dcbb1e000a934e4c16da6f3f9b19e8ce3428208436722fdd0450c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USCGH2254604.
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 0xeafce89f00f0e2cb4d7045e714b7254c130b5606a0e15c07e45ceb0e2c67b29a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USCGH2254605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248cca5f099989671b0eced8701e14bbe7a4cf6f58f6d584e564b0b8f0550085. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USCGH2254610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb204c10ab24c38ddc841045629b5ea60dab097383d9f1411e4e771419a40fa. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USCGH2254611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567d42ccc66c757b82b1a27fc5782acc0c0f1754ad7ff1447d6f073bcfd5424f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGH2254612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68c0bc9e31969eaf40f666cd03a1e9129ee79b756e34cc2a1b2f0e25b665097. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH2254415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1236c9a3be3236fdd04539a4c4c5abfa766b0d594c26bc638fc0d135ed3e6f8. 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/USCGH2254422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451e0c66ef6ef8f2d2f67b1f8c406b52bef99f3cb627670e575c648bed3a19a1. 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/USCGH2254423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087237a8289e2c0352e554054ae8df96bfa28fc3a60779f57c4e03486c5630e7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USCGH2254417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a80ee04bf0790129f41c9b4ecd87809b48a0f151ccdc3d1ded372b1dcdd24e9. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USCGH2254418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04432a22f51fea670fd7ae7d4b7a8f3d21f2b2348909f86f5385b3b54bbc6c0. 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/AUMEV2412930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f2aee3d42d13a238e58930908ada2a716ed6741dd756c41791e458c0919543. 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/AUGBT2304025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f58abd9c2f6c643c29a47795d5c2b26c9aa044a893871737d9aa211484adf0. 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/US7VG2325916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d0842efaacc1a7696c2e26ec148de4e11a58c4971221049c5a25bed3c1aa43. 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/USLD91735549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5201c4530ce7d1d880d831693c57526c5a4023bd2d7257d660f8b196e6997a. 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/QMDA62163067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7521f963d9b754a069eb25cc36273276b221df4b7959156867c8b40639e011d4. 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/QZEZZ2000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5c063dd97fc713044fc7aef67d22dcd3819acf6c95ed45478c8282228ab6c0. 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/QZEZZ1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe891f14787b6305cd2148087ead469b136f5138b8dd855d37d065dcc1c4694b4. 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/AUGBT2339692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e455cfad86c97ed3bb5c055779cadd86615110f18f925092f3f0bd97ac5235. 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/QM6MZ2040813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa340320237b73e94e76ef441fa448a432ca4d07787620c6eb40284f01ecfa397. 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/QZ5AB1634049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6b969eb2daed3f9e3c5e4133c3e9de035f661615bddb798278e74964bd3c1c. 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/QM6P41972094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333f129418bcf9b8cd69c9aeafaf862190e78813d4896fec3022069df83170f9. 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/TCAEF1983942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7e9c45d3935c9450d313fca5a347f36136d12cd932f39ba28c2b5aafa451ba. 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/TCADW1890039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e51a515a13069177e8fa30908dbe54d2d6b25b87f5c1cd07decd08c47ad0db. 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/QM4TX1897054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac820785862c4dda625c8333f1bc4c8f5e4f2dcec47f46b94993da595721ec86. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/COA6W1800718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beeb20ce6741ff0f83b6029b184d2d22416b9122b6979551b60ee61a13e4ca1. 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/COA6W1700493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e590a4ff0a127d87a3ac34aa584dc2370aa6adda0a9450c481fc8d59446d00. 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/COA6W1700219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7340da1d41e3596330b1476c59bc4ecd283ff2bfb4f48b1b1bbe63235aea0d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R1787251.