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 0xaf33b44ba303c88c7ef081ee330271d43f3fe64359b755324a24f18b82f5f5dc. 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/e4694845-ba3c-4a04-abb4-17bea8133c6c.json and https://artists.proofprofile.net/proofs/artist/e4694845-ba3c-4a04-abb4-17bea8133c6c.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 0x26e711c74e4a9c2a34f44ab93221c2ee242584d8a8c273c196f656bedc5314d2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF366612033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbab8b70441e476a75a75a6946654643e868a35438902be74c9537aaaad2e92. 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/MXF366611909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b78e06d0a07fd27bdb982875dffa7d1555e8fddde7d30b1a0f96627efa43764. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:35:01Z), 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/MXF366712590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa554adfeff123a58a367e09848486da4f3742d725e8987074a2f0cfe72ee9ce3. 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/MXF366812572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4df68c81881e56c47db03d6bfb694868739657415f47bf977ca8e537a715f5c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/MXF366712604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a7abf765fee3d7729bf80571dadc1d0a4aa1da4b1dbda8ccf3f88a4419dbfc. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/MXF366612419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a17c94b6c500da4d0faa14a63feb89ddcb43b9947a2e667000c6d796113575. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:23:38Z), 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/QM7281544677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98000c6e5570cbc5e6024f763bbe074ff48e45aa714b512f4c0372b1bcc339d9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:46:06Z), 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/MXF366409920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac1004d177d4ed840e20ddb1e5851d8c47cc4797747ec6c567bd76507da7f30. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:01Z), 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/MXF366510471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32148be715254068956da646bcf8f3ea7d58ddf5cc47a5d0434511e0b5a7140. 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/MXF366914721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56cca5cce4bd26191591fab58b13f1b993f8ce4d14e8a93a2660266d802dd45. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXF366914937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504869a8564c4978305214c9b19cbbe4bdf0102d16ac71cd434be55dbafbe27c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/MXF367117122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef9b09be330f6df6db35daed401c0abc4e9baf37c683baa4488e3f06a5a257e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/MXF366409821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84e2336cfe2eab35b6ea1688b6ac4e8e1f2fd28c7a16e5b3d6ffd140c9f25f7. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/MXF366409790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046aebece7b5ef493354f7888345c6d302cbd7e7fa5b242145d25140cc9f37c9. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:01:55Z), 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/MXF366409837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33962e2497f8e767be461327e15ff97f4d2bfadd17a540b2b49a79e72808bb81. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/MXF366510476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96038e680741aeda0514525f592c954a0c4d92652c79f01d8393ef80c1bc0044. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MXF366712491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969e2aad45eb90d91b59af6a464d16e1d8fba1f98af0aa7b593c4c71e5df7c40. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/MXF366510485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd363a6ff3c59c4709110e02957bdf67e937bb47f5b174035b7a2a495e3897488. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:09Z), 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/MXF366309205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed438c51da66fb541ef1781a77f0afc2031bb97459634b424f63051d520417. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/MXF366612364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4b585a34cfad9c9f917e4209810fba26f234c56b11fa0379941d3b3a48acff. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/MXF366813520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdf06422cfbaec3d5e47e78c78f1cf6edfd4bcf287094a94503cbda0513e392. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXF366813880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f35ce18fd9db59fb5d1366cef6ea3db91f289ec1edd79713c818eed79672bdb. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/MXF366814065.
Colección De Oro, Vol. 2: Podría Bailar Toda La Noche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299d0b29a233fe9e06eb7605babc49e7b01ad69c0a658247527ebe63a4d582d2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXF366510473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d97ade685c56989b48860c6f30579645bdb12d90898b01e61e5af390159a329. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF366813741.
Colección De Oro, Vol. 3: Un Hombre Y Una Mujer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9912aaa162f39c658170a3c4c537e13ca8fc7ddd12b5e5e2ecf3da73632f496d. 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/MXF366712581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe795ec8a3474ed18e0c0b318b1e364b990caffa698e21ddce29ba96d0621587a. 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/MXF366712543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e221b5874262d766d7e40084416506e9b35c3ba3d2aa4c4a91f1f9ca3c8f41. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/MXF366612365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e489715dcedda069fa404b31c79469ee3f726f1397345d75e99187b0b4cb7e. 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/MXF366713330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28118af0d44a57a0c109c9c3faeeb7cfbadf4ed9b7a8a3b6a8c4d8b116976fb7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXF366713006.
A la Fiesta Con los Aragon y Sus Grandes Exitos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d93d289f8007c6b833a8a22cc1625f5ce75177b0a7cced2f4acbf133b9b179. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/MXF550811721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0818009d9b0b7ba0297fbee32378c9bd0d224fee4ca3f12d0de4dc5071eb14. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/MXF550811730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf862d5d15dbf26561f7ee691374b71840eb8422373d6309a1b0d1518765eb0c7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MXF550811724.