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 0x8f1e09d2bbf7cbdf4ca35439681fe5723dafe348bf9967ae210e618573ad55a5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c436cfca-da64-4aa1-9e3a-4387d8bfa1cb.json and https://artists.proofprofile.net/proofs/artist/c436cfca-da64-4aa1-9e3a-4387d8bfa1cb.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 0x5d212cac6ed6a20e33f9a57810f3affcb74953276b2897fd90a04f78f98ce1b6. 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/NLS6R1870716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd575192398df8745fd056fab88519282e7b793306b493fe80c29a8699b8c76. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/UKXN22099150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd575192398df8745fd056fab88519282e7b793306b493fe80c29a8699b8c76. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UKXN22099150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ddca62f2689375ef08204d079a4f66ddd3da65c3f85b5c68b2242f125a341d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM92141164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e439f5cd7ad11e0525edc9a3668fd75d63481ea81edf3e0ef426beaf90bbc63. 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/USDY42286638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a38c2338e9fd85fd89240492c5f48152657397fd5924db38b327a89e418ac48. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USDY42286696.
I Never Wanted to Be Alone (F**king Feelings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7129ee9d331620cfc37e600eba22fbc81ae367a4f00b65de99541dc9abd48e75. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USL4Q2213442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd9f5815b622243bfdfde5a465615916cad15e46ad6dead07ba50d044364ccf. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DGA0L2339442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27949f2fef6902e0b531596ebe65d1d1d9b1869c8f7bde7263661d03f1c5e7de. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DGA0P2376733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50124a34150930d96a6a04c276e8b1f512fd1874be7cb990a5db494de6501c14. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR10S2443410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0ce4ea7f7debfc358bbf1c4194476d81dc18a41b6bf9041082c702a9b11884. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S2461817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838a820f93993fc6a97680456e77fd4e7fe8ec1e3403e093eb88b4a3f7101014. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AEA3A2392078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823cda5d5506ed58414fa002f411bd988ff6684614f30f1a15e111d393aef12f. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SGB502585368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823cda5d5506ed58414fa002f411bd988ff6684614f30f1a15e111d393aef12f. 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/SGB502585368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa066e55419e9925992d4735c91f3ac2b157278eeb11a0db869c0bb26ba8e4857. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GXD7V2574032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc9a353562fd4ea123070438271fcba47b35cdd644e6ee1d27b59b344adcdba. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GXD7V2521919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823cda5d5506ed58414fa002f411bd988ff6684614f30f1a15e111d393aef12f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SGB502585368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc9a353562fd4ea123070438271fcba47b35cdd644e6ee1d27b59b344adcdba. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/GXD7V2521919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa066e55419e9925992d4735c91f3ac2b157278eeb11a0db869c0bb26ba8e4857. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/GXD7V2574032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823cda5d5506ed58414fa002f411bd988ff6684614f30f1a15e111d393aef12f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SGB502585368.