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 0xb32919b075f9a63d858d866282471e6f4646f00e56e75079774197cb9169c901. 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/fed73b73-c544-448a-9826-98e290c46b41.json and https://artists.proofprofile.net/proofs/artist/fed73b73-c544-448a-9826-98e290c46b41.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 0x97c67dd6bed0cfafe3167c60bfc16977b84df052735ad2a975e78cea8aeb3927. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USA2B1701616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179f4c0a856f5938e71cac8a6282dcabca76d82e4b9e495ff3decf44b92dae66. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMP2J1400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5537f9769e9aaf166f4d862e1e765d403edf235368697ba31e746320191dd29. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMP2J1400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c6b3a0bdf818be27c5ce55642c69bd5e228a07b73de0a91f725a2774cb57ad. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMP2J1400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8331432afe73f04275c70e7ac98add1458a7c235423bce7967e7e043f0e170ed. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMP2J1400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c49dfc5910e96d842320728db17c5dd97269c4befdf8fe5e2cd63550a84139b. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QMP2J1400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86aa00177b7f3a81fe71f131d17e1190e1512614398839c5968b2f61084e3dfc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMP2J1400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b2403b5ae0dd0165e22dabfbeb236b34d9355c26a31e3fada0812a4624674. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMP2J1400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b25166746cd248f770d38cb7cd8fe0c112682a78c9c324f9b5f830676bb622. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QMP2J1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fb4747cdc1cfaada1a1fcf4aa501182a694748e321b45d02ba12a47c964bfc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USTME1850034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cbaa642ff92c4daf1472caa92bc67e70a1fdc80d48c36564ddb0a4a5c920dd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMP2J1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc557265ff9fd19a4981a8e1a91766dbe04028272ff6d7354b53cffc915bf1d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QMP2J1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430f34eaa2010a861dcac21d82266747ebed5b9284d84e2ec8e5f09c7240270. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QMP2J2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c661f1d930dd51421a3a493d2192eb850460b1408bcc141c2cf1dcc36089808. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QMP2J2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b8682d5c6958e300a8935900dae526ae5713eeec34375e69e733d4f507146d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QMP2J2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acad97e91bc364386e2fe0a801004aefa882816f57c25fb20e667e7604091b5. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QMP2J2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2b608a7cf48434e832a670f0c4a27a36a44e0077b3cfc8558ab5623b2f0d47. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMP2J2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9b0467e2fb24fadedafb4f50a08f986b05ed4b8e8b742109dd68a9f4dcd25d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMP2J2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ecb3cf1fd40b81b6adffc7d019218f89fabf9a882f2869308cb3c8a227d9c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMP2J2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47a08310447739b220cc6e26db513a2834065b3ea231d6cca48068dbdeb6694. 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/USA5W2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47a08310447739b220cc6e26db513a2834065b3ea231d6cca48068dbdeb6694. 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/USA5W2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47a08310447739b220cc6e26db513a2834065b3ea231d6cca48068dbdeb6694. 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/USA5W2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467f2ad34aebe789cf54d96b8b4824c46f9dbca78a2a579b3ab1bb8214f5866a. 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/USDMG2120709.