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 0x2493bdf692f70d1b8c05420a2b4f3739c53e05aa146e2032c9630b01a360d5da. 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/30cbfdec-ff38-4272-acfa-762cbe21521b.json and https://artists.proofprofile.net/proofs/artist/30cbfdec-ff38-4272-acfa-762cbe21521b.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 0x2fcf0618093a0b6b5ce66ab528387ecbc0afaa8a44f29b22f748348f856e2ae2. 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/TWA532200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0543b57182b26713de46eff2b44b529e582925c326248ace0c06bd2ee0d0e913. 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/TWA532200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b4cf77bf5bb067dfd82cc07ce0f5bc83c6c5ac17bd03110984eeed8d2903b. 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/TWA532200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a4a19e95a069d0db9ac3fe0e61085739dabcc90b0dddb90a4d9ba5fe9e5b52. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TWA532200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd163ce1a1c282f739c6b0bccd71b774cb156b3b1264341739ac6a3c1d3857873. 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/TWA532300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d532f7e983a5adbb76f873e17a85bb8df57345ed71c7ceeae2b3cc2c7fa5196. 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/TWA532300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6e4925857d1200aed7954d09a32466b7c9d1380e51b623f83434d81250bb40. 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/TWA532200381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9179a53dcc4ca3fe4ec62d246694c4ffe4873e7aa8238a010956b03d6333df7b. 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/TWA532010202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea4573320d3b00eb6f67b61706a730c02de034528564ea166b72a3d184906d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA532000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916a1d8d77c8fd58074f6511c4659c13c0cd77068ebd4ac3ff204f77a18577eb. 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/TWA531901764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa51a47cb105e232aaf1a3bd7d8fa520e8aab9b4dcbcd0367f2ffad53fe9691. 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/TWA532010208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348d85f5893b3bf4b7fb348ffd4deb23c34e70546131e6eb22adeaa9ab76a246. 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/TWA532010209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699caf23da0b9bb7daf662a4b822cafd0b642f32de6d325f95058aeaa2eb46f7. 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/TWA532400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6e4925857d1200aed7954d09a32466b7c9d1380e51b623f83434d81250bb40. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TWA532200381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0543b57182b26713de46eff2b44b529e582925c326248ace0c06bd2ee0d0e913. 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/TWA532200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a4a19e95a069d0db9ac3fe0e61085739dabcc90b0dddb90a4d9ba5fe9e5b52. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA532200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcf0618093a0b6b5ce66ab528387ecbc0afaa8a44f29b22f748348f856e2ae2. 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/TWA532200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e75167b929c9bba1e436e891cc26be393e1da29687f80af4fbb1839e36ee08. 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/TWA532100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd4fc9c68eeb52d304ec77f3593e59c425718bf3a2903f09b9b63eef9448dd2. 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/TWA532002614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303e2aaf2e4bac6394f27d78b30997a6a9529409df63d0a75d5b01529f10de95. 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/HKI492019202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e2213630df38dea014ce71da2218a9f07cd6ce7427939c50d3cf0690dcf16a. 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/TWA532001178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea4573320d3b00eb6f67b61706a730c02de034528564ea166b72a3d184906d. 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/TWA532000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916a1d8d77c8fd58074f6511c4659c13c0cd77068ebd4ac3ff204f77a18577eb. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TWA531901764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4027b9efe4ae776f6b488b681ab4f068cdd2e7aed3479bff520cd72ab8e698f2. 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/TWA451601306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450028b6cc8cda73460e819c6e8995f8af6fdafe11942008703b9603bad200bc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA451601304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a6c3514be057ae8e93ecf4a4d1b94a6573082fdf125e9c69cb8ba3ddd7836. 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/TWCC31800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df2d901158eeaa7cdc81d2c838f3aae943d8ef680b3b8cb91af2d79a149db5d. 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/TWP012163603.