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 0xbee9084c23f83d40330ba190ad04b9dc5cfb9e61aab05be67feb32e53714cb52. 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/fc4d94f4-8b2b-4461-99fd-e54265b61c8a.json and https://artists.proofprofile.net/proofs/artist/fc4d94f4-8b2b-4461-99fd-e54265b61c8a.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 0xf6df60de431ebd02c6cf2e1e02c1f19304b810184dcb5a0997c4a9c99416388f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFT2599680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962eef4fe4ee00a76d362b67c2b645207eafb0eafdca75bdcfde8efef9a8ed0d. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZWFW2518232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ce621e4aa5e1cf893ac7777f3208b883c110820532ede2b198c6d227e440fc. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZWFW2518233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e78a884adcedaa273b821688b10338a5f72e3b48b9435ba45671116a6c5727b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFW2518234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf9ea95d61f4733eba902999f3bf27cdd65b6cd396d006d216c80177981bb69. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:10:34Z), 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/QZWFW2518235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a5d1958714bb664c6fd4e60199bb73079c7e03e82f45ee76e32a73670bf5a4. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:58:33Z), 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/QZWFW2518236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ac3e2e63c31395bf97aebedb309ca9540004c12968340eaaad87907d091326. 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/QZWFW2518237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9f2db3b9e866fd73fa8a759f985c7d932d96e42e879b712c26cadc75c25c18. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFW2518238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7c4f93821bf87e2cd0597ad7a6f0c08f1b907c66b0a6ee81c31634dc68057c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFW2518239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d939e4ef9db9d24d5d4d97f50449656df4862ce39bb1d93698cc542554bd07. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWFW2518240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07b1254ad65f83d6f87c0935d1ff722cf9e0742dbe12c8d276564d7a8b0de7c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFX2575228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbad8407d135d9297db84a3537a22a1cff782310bafef32c8201df653d6cde03. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFX2575230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5870d0ffb671c16070fd44456e17e43055e00e1c4da8d3b9aa238ee8ff7b8ed. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFX2575240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496bf284b7e6f5c34e6b71956104fe3d81b1c3c764eba33ea49c07dca0b2918a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFX2575241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca03eeb8204fdc0451aabdd2584986e9ac538f73520af5cfc13aa5302460e9d. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:00:16Z), 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/QZWFX2575242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ff60a183580dde7bd400eeb4d40d0e357cbb49f4b4f9a3aad53866689fee80. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:51Z), 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/QZZ762598137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38badc532ec4ae0f3d448680926b2dfac7bb14ee2ea5c6a30d4085a6aec59c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ762598138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28965deb27386d4800647fa28985f889ea8eb153c9ec52f897d6e4270c82897. 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/QZZ762598141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8728d1bcb56ba1fa76dfffbeb6bf7d1c134b772618bf377fe432436c9af75df3. 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/QZZ762598142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59866a1aa539bd2cc873d4ce52281689f6320f7819dbf6d948ee004d5d587709. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:31:28Z), 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/QZZ762598143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15b1ef996193941eeb5dac7dc7b555d0890d87b9fe1d367f103d243e1e9a9c8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ762598147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99df5f3d990024a2e9ba4f0632bfabf9bb01def73bace33ed1be12108a5b1dc2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZZ762598148.