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 0x25521fd8f543df7d1bea1ff52603bdf97a6328c083794773d31b016bf974305a. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37265458-5acf-421a-afc4-7c06540a72da.json and https://artists.proofprofile.net/proofs/artist/37265458-5acf-421a-afc4-7c06540a72da.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 0xa4082ad4f354a5ff3ae2554d9316d621bab31935bfa6bef0455e83eb05d87b76. 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/TCABL1374334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8badd4cc6ca13b18a9f67d0a6fbb84ff6f91379b0135a4278821c4f0b62f2de6. 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/TCABK1210743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe9bb5a32293e84e07d177a32edd4ef82725545c0d3ead886fed54eb15f65a0. 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/CA6D21000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe292c8f00351065864f049462e7c3b5638629c02954e838df755c357136ec3. 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/CA6D21000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d48dbbf38aeee36346126500e7f622d454f14f28fb56899cc78f37b201b39d. 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/CA6D21000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afafb6985ac50fbf80dd6999652b67cbe5eefcd5ac3825024274b5f334f20fd. 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/TCABM1362634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266814789ebea60a56b4c0dd86fb8ba3aba171736670cb6a675e3cde8839882d. 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/QZES92390952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b236636024761e7a96364b90086509a6cc17ecf6b78341b303e262384f8a2d3. 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/TCABG1275968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8ae6bc898e5e5789f8380841bf4c2315fba484908fa3156590a55172a55f6c. 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/TCABG1223433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29af496d53fbfd2fd5a8e3cd51b8832e06bba550a257559b299e5dd6537c7993. 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/TCABG1275703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4edd5f831db155237b754724166be4f5f16b004049fe6d9ca8ec479997b3699. 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/TCABG1223436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce140be03bc455c216936aa07caa3f1b1e3d5ad7fcde24c338fe969a13514ae. 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/TCABO1362667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6609bf4e32f03eab28399f304a4999cda731f6fcfa0fb5a92eed226cfc5a3. 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/TCABG1275944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ca47202b538f3f0f5011b180fc762a11cb1aaf4650af0e36e0842ba4281b72. 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/TCABG1211058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb83754112acc29ca05ee6397e976ec628f68bc817b15b5f5fc1bab62f6780ab. 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/TCABG1275952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a67fa3997ee4a6b21aa59a47e6bc4ecac58ee731c9de47806f399b6ff1ed4b8. 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/TCABG1223460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e79288611871a1b620eeafa25dd00780ea4ead4f2f720a2ed793b55a3dc802b. 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/TCABG1284815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19dbb1ec9837686a21274bcd27a3571323d57ddee17e06fff93973ba127dc20. 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/TCABQ1315012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a37ecccd4b0f7ba949e0f5f344c114a7d0ab652cfdae36c2593afbb4a76242. 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/TCABQ1315013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7d457205be2ec7218b0fce1ae84c96be8ffa132ae21cd0428996e98444c4ca. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCABG1275692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec7287269313aac28096dac8221c4927e9b52a5f1afd371f1d53f1c0ffa675e. 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/CA6D21000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7a900d496181826852b49a9172425557e88275be78645873ca362d25fc309c. 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/CA6D21000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e96d64130f60e3263fdbb0f340e53d2a8c4681d0c2f4adbed7d62e9ac95678. 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/CA6D21000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd76ca42cab079dd15f0e0abac4b3bf35967da1cfb90b2f2a13947324f5747e7. 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/CA6D21000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e33892cac14a1862ad73ca7cbd2045cdf7bb723c1a897387026e400a6269dd. 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/CA6D21000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15758196dec9788909c0a89479ac85d07543446ad35258d0af9c901775129120. 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/CA6D21000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09220f7d1a8084f89846f2afb45455ba02507f9abd70edb0bfe042b4590c5bf. 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/CA6D21000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4082ad4f354a5ff3ae2554d9316d621bab31935bfa6bef0455e83eb05d87b76. 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/TCABL1374334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafc47dc83aef12ae26af11c9973046c28107a51ba7939d7d0b254b6ecb95189. 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/TCABL1374364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07e148fd8d20964843e9c46d7a1a92e3d5f133a7d87c315ba95df92a7921672. 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/TCACM1681856.