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 0xa4c6e4832c5dc035bdb8c6135833e7bfb7442c3eabaa4f9757147aa74a508913. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c61fbdb-38b6-4fb6-b110-0eee83b54337.json and https://artists.proofprofile.net/proofs/artist/6c61fbdb-38b6-4fb6-b110-0eee83b54337.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 0x0c60de58bc1ea4b897eaff12da4f317e61bf130025251bbcd162e1859df908c6. 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/BRWMB2300823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaa2f434a65f529cb80bbedba3463ec5f5fab9ead3e3dfe17cbd40af0a5e092. 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/BXOPY2100001.
MACETAH! (Versus Vol. 1) [feat. Tropkillaz]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb372fea67024b0fc32e3f3cfd56ffa36523b748a6f508964a97e6f4da5cdff0e. 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/BCMNK2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69beb089a0b1d19e462eb0315c139b8c3d1e47722dc5ca42d546a54f5fd22b. 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/QZHZ42113781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7f5cd19a7e75ce3aa5e75b5cdcf5db337633f58a8e54cb0fdfec090ce6d2e9. 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/BRQ4H1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dae0fcf1707a4340b2e2bc19e85584f94c68ec6deb93b0cf16880140954aa1. 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/BRWMB2500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7d1338e956805eef32fcf4ece1854222d8508376910a71903c1e018f4618b. 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/BRWMB2401932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6325c36effc915aed483b1bbeb70ff7884b5b0b97fd24bbb10ff483246c0ae83. 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/BRWMB2401014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd17a58f9809cbebe3d06cb3f610d60dcdfebe62c14b64eccc3047ba79f39136. 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/BXJK02400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0577ef57edcdbe5bc2ab43a9739934913550139c29294ea6710940258a178c9f. 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/BRWMB2400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac4d2b8b79d8b2164aeb1407116321f22eb6e095fb263af56a8e163e400fd13. 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/BRWMB2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ca93be35cfc40a1bf08372ea097d84fda6038fead75ded618ab40daea5ca52. 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/BRWMB2300636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284d6806f87a67b1257b9da89033a732eded24d78e35ff35a9db0a9b4a3e5b74. 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/BCKKP2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abf57f58fec4d53d6ccf1f1e3d57b3f7140da00eee532571d85994e7bacdb40. 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/BCKKP2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77d6e626f4743a3ba995bd5c45ca125a9ec430902ae8f8e88761eb7f4edfc7f. 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/BX08N2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c91309a262065d99d2dc8c6a9b1a2c9f0d251434cf3f6d3b1a0f8788abaffd. 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/QZHZ62141281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa2356360a5548adc2d823be002004e5fb714fc6187304054b1edcb4ddabcf. 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/BX6Y62300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a84623d3e78696d9c561f537e062c4e0cb760355713cc846298ee0ddabe8c. 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/BRSME2401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e5202bb98f261afc75458ff0bb79a4b2309278e2d04e49216a784309ab9514. 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/QZNJZ2317312.