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 0x63ba189161be10d4bfd4b7af8a3b02c9d8ca354ee905aa071509a4fac4b26001. 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/53e90d34-65c9-4dc1-bddb-446423ffe070.json and https://artists.proofprofile.net/proofs/artist/53e90d34-65c9-4dc1-bddb-446423ffe070.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 0xc61f4db58b27f82a3d2491b8cb35c279a24beb58c4ae13d11478c193ae19c565. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCADW1828788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566a630acb4e65a7373ca11d20d22b268249858ce64daa1fd17e5f95cd04d854. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADW1828795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4a19a8fefd4db36bfeaeb2ac18d8c8b24f1ac4bef67b47a8e6904f2ebede61. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:28:25Z), 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/QM7282015683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efec957fc8075c3e47804e40a0eece8150fe8c512e7a37b13748caeae0d9c89. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM7282015684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6308021c157a5418e35d5f459851ea270a820d8b23c8d79693f7800437dbcc92. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:52Z), 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/QM7282015687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5338f3602fe226cc1dc17b12d8f74e801e7850f9af0994b003f9040a048770. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QM7282015690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f5cbdae147353b917b79015bdbcca9296d53cc702d323ea9cfcdfffd706185. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM7282015691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe580ad1b46a506eab1080b475d55ed3079a74acdaa8bacd65316b31bbb16314. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMFMF2033477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228cbdb5752c8b1d49af4fad3d60913d22982bc4bb03643ce480c4c97d000c46. 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/QMFMF2033478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cfa1a7a749e3bd340c421e4060e146af672da18505f9877698dd0e3aae6c2b. 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/QMFMF2033479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70270830693ac28f602ff77f1041f990dbf46c001a350040d9fc2cf35f4e91b. 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/QMFMF2033480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77540be981545a7d8676650af81679fc3d3c8a9c8aeabf6920651f275679541c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMFMF2033482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea0f14f9c0047df7f9bb01f99a9b56ecc33f5ab4a42b4b8640e3b3bd9949bbc. 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/QMFMF2033483.
The Night I Started Sharing a Room with My Sister
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9728123f53054f9c3ea5c10dcbe5a978b9050ec25a6b13e260156333cdd82e. 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/QMFMF2033484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5742a01a337550006adb5dac4dc814eea744951eee640f9079f8ffc948de94. 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/QM4TX2106819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f5ca81557c09f6cd118f162a7a5677e4bf0994a55f73f3f4d3d65d00281163. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/QMFMF2033481.
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 0xa201f20d7990a4def8b18ca3df1d88d5d778697738c190acfc03878ba14710eb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF2033485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d46b136ab25eb9236da6a5c8020214617223271268e723021662b812efdaac. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMFMF2033487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30de0e2e3a448478efa6f01d46fe17300f4796fa7e8c500853eb925397aa3bd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF2033488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea91f73b0e17c4c587cef5bad8a0a85f514347370d5bfa957cb58f5ea0dbe30. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6P42484122.