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 0xbdac8f0597d2e3a12555a479810ab6e06a55ca28760e60827d4ae8b4bad67b3c. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bd6ef7f-2f2a-4b61-9eaf-0e72e23b62d0.json and https://artists.proofprofile.net/proofs/artist/8bd6ef7f-2f2a-4b61-9eaf-0e72e23b62d0.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 0xb35f1a2fbfd546005692d0f50c75f45b9b6c7df986c4ff6e885512cefbf670fa. 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/USCHR1384370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1ba9ad4ab62f33aa6cbcdd201ad8418d6d572209ed1bc33fa1a8ebfb32bdee. 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/USCHR1384371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593c87dba3e52b266b345d3218e3a2aacf7dd118bb6e8b0c0ade42d5e6628502. 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/USCHR1384373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86d951047afe297793864f2d0ff000a7180606615f9fda59f4235210f76d8bb. 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/USCHR1384385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92df91c12b22fa0153a1d53809f15d80215aabcdf6666d49a36e5e614fd4efca. 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/USCHR1384398.
The Rise: A Collection of Global South Asian Hip Hop, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14876ab78207368b366e69def946bb38cdba521519da3c1602eb75a7fbb3b412. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBWUL2173309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c1d376e51882080aba382546faa314756e8efc946f878aace5c05cbb02e492. 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/GBFUW0600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6193d33beb5fb68685468e1613341e18824d2140723d75bfc2997d8dfb1ab4b. 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/GBFUW0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0247155cc50788530a7d0dda292730532c17b2b0750064fafb1c101a7f2ef76e. 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/GBFUW0600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59084694bfafb821e22547dfe6915fa26171c9f98aaa2755c21c2d1aff8cfcf. 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/GBFUW0600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005b872caec90cad700a416becea353619240ee75c706e9bbace05866d937058. 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/GBFUW0600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccd144911884e0c215ad453b9d8820eaa8a5d41087f75a393a187d4bb95a2a6. 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/GBFUW0600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c0aeee81defe2d74bbee9b40725b5d4212ed296c43c67c5a6ac48a3ad977e. 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/GBFUW0600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc067f10ff64ab8d55287201e19570b43a29155920dab45971ade59446af9c225. 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/GBFUW0400802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3ba89c6b49d5f05eb8457cfb4f5a21aec08e13e1e23e2780aa6cc6863b45b. 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/GBFUW0600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24705521ce7b13f74109199b7bf3d7dae6da7f6854b7d983749151c23d8c1ca8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBFUW0600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba52c128c830bd943f7395317d163527505e1a08a4578b93ee2055256aa07f08. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBFUW0600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a60453ae122461bc0d5aa10f015f64cb3d48b3190f5f07e4e4e664f97057aa. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBFUW0600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f60027493ddb8d984355894e6d9daa66e08307d06ccbc3b435ae21dab5183. 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/GBFUW0600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732b50f06a1bfb107a3416e58ec4e0745fdd78d9938ced4bf4e549857f44db82. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBFUW0600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca17971fadaadbc695f53a7ef9cda6fe8a55cd0538911a0640926dfa93f228c3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBFUW0600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf6d4cf587725c08b9a18ee8235c2f813c77e6673229fb96c3623fe1c4894b. 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/TCAEP1914503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f793464c3f1343257e05df06ec47d09ebc54261066bb0b82bffb91f3e7ea456. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAEP1914509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9f866f695c79e0fe63cdc178da868b86a1abf944c9be61fb58b396e8fcc2b8. 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/TCAEP1914518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7a1c1c1d0a0864781cf4868f0b520fbe62f0f3d54e52f27fa044ee5926f5e5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCAEP1914531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28255603705b4f1f05d8a25500db55c18410bb81cd35891325ca713ee1e0ab7. 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/TCAEP1914476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff708bb4f8b6081a7d54fee0b80a35d57c632973ea603a44ebf723393526ee8. 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/TCAEP1914558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f44e9db0547e30b68ce3a8981830028b350ac94c0d926c4bd6814b0d4ad53ee. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAEP1914566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ec09c985b6edb9ecfd855e71620c7244069d2aadeee0eafca8bc39b89bb5d. 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/TCAEP1914590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cccdb1d9e62713b4e9ea1962fdd11fbeb1f8f185dbdb9fbc1b2120ed8b598c. 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/GBEQ32100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441da3e5a26a5c99e4a78555da9096a0d7ee98720f6e26282b973faf1a9e3d98. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCADZ1812802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bb70566c78bc3a19ff7bfe2d16706a7972e3e7a4baa17906458e0104423539. 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/TCAHB2314235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc57229dcccee2856c32a6bc5d8f98b0809effa907c7ceca1149abdaaa49c91e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAHB2314246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc2e1d46571403f517064504bb19cfbcc8ec70c679d286b46292acbc42ba06c. 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/TCAHB2314254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6496be165f8c71957e93699d21d8a1c9f8d7d9f25e0f8dcb9e832fee89fe3c1f. 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/TCAHB2314267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322117b6a895b31a23dca28db40b6fbcbfcc3e29d17e09e7f35c568f90e59571. 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/TCAHB2314288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab839434669a0b28c39a12908202903a9d33b211fa9831d5da8e954e50e74403. 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/GB7HE1200701.