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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 0x3a9f34829453a725f4a2063d584df7508c0b8a18d943e2a83c34de1f3d6e603b. 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/da55e0d9-4c49-49bb-bdd0-19c03a52f099.json and https://artists.proofprofile.net/proofs/artist/da55e0d9-4c49-49bb-bdd0-19c03a52f099.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 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 0x5e4fb1959585b43b7654d53691ed2cae9de4308e54fe46cd1e3bb5494eb5288c. 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/QZTPX2158849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d818df7f662a18575e2220de358dd0dcb65b69d25e6af893d73d7a11c6ce51. 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/QZNJZ2269947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a1e8bc48b9dca95f3a6a431948f6a16680bb006db467556b4497e3bf487f96. 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/QZHN61980076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a4482b99c36f4751dfabf02a2f969dc15745050b015ccd28b77166973db2b5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CH6541674931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4c1fc42dff5ce275051741544bd87c4e13d9e316b8b81b4681694c94852503. 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/QZNJZ2419886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71b251449c109aff15f826de7d6eafffa8b57df0f75210fa0f0b7b3382e13fc. 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/QZW9L2436054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b8cf9e4f5101d065e037698b7596adefd05b6f4ec7f3f9c7070b1e8b18a5a. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZNJY2433093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304ed338152aed4f89130cbe52a92a159c50050dc09fdcead725c28c86d7ecd0. 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/US7VG2409438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba9c61ad7558956a7bd06704761d183184d3e9ec72a0656a4c48efc2d8e31c. 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/QZW9L2339507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7989d10d8aa860423c090b8dc2930128c24b0f73ea3d2ae24ac154e6acfe6dc3. 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/QZMZ92224139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327023e3e48fdce65ec759c4fad189c5ff7492a7fc2c14b6755c1cdb9f24231c. 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/QZHN72100571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe257b81d6872aaf0bd9608f4019ebb6b77f10911a782a77708a6b54bbfe693eb. 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/GBWUL2077982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8b90894358b73d865cf51c47617c5bb836fa1e3e39fbb6197fa0016fbb139d. 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/ES71G1940584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c4c686e4ac23c1f41ca9d4b5ee1f3d771c09f0e1529aa0e9b230987bfb244. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCAEC1942588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebb2767f86e405b9c0c30bae44643736830d62795439ff11c6a6c2f6b48c058. 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/TCADG1703036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb3bdeff444167c260694f54cec01762debe8f1dec03107f3052cf03a70093. 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/USCGH2014608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4247c47b1641a37ce606597e730e4524f767cc2873b11f0e9d2b34752bd0615a. 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/QZFZ62088251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c1867a3ea79727398f056116194f926fcb25ad67512ea4a7e4c7af5d11b80e. 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/QZNWQ2255662.
Scandal Rosa: (The Lost Tapes,) [Vol] [2]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a958cab627523e7645ef6af5f71556dbe0192178320ac8c5c6f844a38ced7a. 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/CH6541632953.