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 0xd358782d6b2bfd8677f7e9bc65b5a4fe3e8625f5247119fd043cd30f75f7f532. 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/620dae3c-8719-4076-be2e-f89b13b20db4.json and https://artists.proofprofile.net/proofs/artist/620dae3c-8719-4076-be2e-f89b13b20db4.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 0x8c9d2897c10f6379945e68591680d7170a1d04e871f755f1e7bef1afc7739421. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/US2S72027052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a36e82ce83732e2d0bc87a6aa16742bb5e63789823826bc539e3211662ed08. 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/US2S72507001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652165d9c700f2afe59abe801e2dd931977c047b0d2077146677414dc7a36cc3. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QM84B2367007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc506c79b6368140c24d6c8b3ce672d7c1af6d786ca06691784b10adc1e4cc5aa. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM84B2367008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1eab3c43b277300098d9cada79ac63c55cd7715b1c2a149916a5fc7543df68. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBDRC2423807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b5e6726b319278705ad1a500d9409d028b24dad6bea987d2fefce163b16b3. 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/QM84B2040001.
The World Stage 4321 Degnan Boulevard Los Angeles California 90008
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbca9768b4b437685b42247c8b23587c4c27736b08a21737dbc6abfaa7cd62c. 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/QM84B2040002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50cbc3e37c23c9a6aa6f6966f8a9f19af5c30cac26de032636aa9b260905d4b. 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/QM84B2040003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90893b817544079d037512d25e1ff8e0379afaa16c2888e98a89526a9104c426. 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/QM84B2040004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4addc4ab2258bf7cdac459f9440fae80d1dbbf893665788354d3194c4adc5afc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM84B2040006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e62ecd80e77cc01e372e76311a17ea092e5fd13dfbc443386f6d4a748b0a4ad. 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/QM84B2040007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382e4abc13faf496eb4a54a54f239c10c6912e89121dd91b5bbbe2233d1b9cb8. 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/QM84B2040008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539d05b6c5774a95394bb803be0ae45c96cf2ac10bd938d2b0b4b7b1415ea097. 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/QM84B2040010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d16810b83ccafa30f03caebabfd671b0a3c7ed9a06129c526b7983451c035b5. 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/QM84B2380003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5b2dc592723ec9824a798e25d7bf6c338ff755c2bf73b951d025358e91e544. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM84B2247001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e4d566c7a912aac75436783bfb3883f40a74c8b64798ad29088c2d5f86f3ff. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM84B2247002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507b63f6f9df2491abb04796ce9a312bad28914475102637b2df4f1e05fa30da. 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/QM84B2247003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d652298d4385d0a4d07b423c104a43c8ad4b67604de28595235a7d9e62fc985. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM84B2247004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb461519c433b787b0a142698abddb707ddcd4199e2664414e9aecc9ceb7536cd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM84B2247006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3f340749d9e83065d72600a1a159725621f969aa2c90b3b6388e84594a8f84. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM84B2247007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161f4d0f39aa4079fdba249839006495c4195c0e498d05b4cd130c8f63552f2. 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/QM84B2247008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a37821dea19374ba361a6cc85c6db65bd24646b3f7db4bf2a3d8aaa03768c3b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM84B2247012.