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 0x8d47fc4cc44c7eeb5e55cc8f796f928931daa4d1e138babaa14ac2a9b88feff6. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7f8a5e8-cc64-469c-b8e1-00c37a5f85a9.json and https://artists.proofprofile.net/proofs/artist/b7f8a5e8-cc64-469c-b8e1-00c37a5f85a9.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 0x6b749d6dcfdeeec4357cd8818e798bd0b255c563ac845e0c48d6eb2695eb0c88. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWA450893502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b48fe36e3ce4b2dc213ebb32b8472c9d74bd52749dafd49c86114cf3e15cab. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWA450893503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b4b76d41a4554ba285e859c5f41546e97cb4a5677be6890952171de45a60af. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA450893504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7049895e02dafd11c1f833333fecea1d0c44911fd979f6955846b42685f0f20. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWA450893505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bdf743eb855de4dc775102b4c20a9540d90b5d185acc663357f4c53537d352. 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/TWA450893506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96411ce83d05babef999e02eb2061ea230b19ac8626167cc5f5cfbe5211a58a9. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/TWA450893507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1725316efaafdc06c8cb11a7c1deeed750e0f37245ddd5d09df2287c1abd434b. 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/TWA458511906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f26699295096513e0dd431c4a7f2c528f789d53998bb1cd328804dec386a6. 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/TWAW18800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9008e04aaab8e9fde13155c833e045257ca78bd37e6435f2f3e6f4a57574219. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWA511300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bb8476b8a0d9f1dcfe2bdbe501e083af632f61a2f6ab1c70014ddd1c9d692e. 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/TWA511300524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3ed06469d244abfd9695cd888a43b2438ea051441809bdfd5f68bac91f88d0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA511300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7008cb4c29ca3a105d6ab9b4f8e41670b4aca8022a79539577e81e4606b006e. 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/TWAW18800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ed42721f3c07b80d7cf6c99b99dbfb61a7878336c7ddc3012c81d68144f9d. 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/TWAW18300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbb83253903a49f91d5543ddec58c172fa4d87416a6f300031ba6ebaa4074a1. 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/TWA511300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931c5efd19f7e679ae561e27cafde51dbdbd08348d0ae4dfe9749f147e5c9df3. 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/TWA511300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3df7189b89655d2c7582a579a1b30643ee5d93ec5f3f29464914721382525f2. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TWA511300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622a54058b12ae6c202c79dd6bb19ff4fd608138ce7241ed270ea174a11fd95. 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/TWA511300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ba7b9d1b81325679641790c60851597f40c4e8924427aaea343471fd54e39. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWA511300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e58b13f64c7d14496a588b258b30382de17caa323da5d4cec9301f0b0b05d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWA511300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e4ba38b6fe552c73264dfe9dc3f47c1731733ec48c19b0c236c18f6fada593. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TWA511300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cff5d289ef4c7b446516e397680a93e5e209770f6e3c261382a803a71f393b7. 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/TWA511300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9e79eaf74ad340e140676a4dcf1ca6e5dd4a7197e253442c45cbe64055ea41. 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/TWA511300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a61c935e92ce03d825dea85d02185d7af026800853fb7c8ecacf5ed1d79344. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWA511300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7be83bb07cae4e29f2394e3554bc0c2b552d98747279bcf8e7e3c5389a7e30. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TWA511300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed65a2845de289877b43f0a7d8c7ef92d22c44876e653ea58046148e6da8397. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TWA511300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3492e686898d983921d62cd8fe234a233b6ee3bc01eeb8f41b5055031a66331f. 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/TWA511300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa454b9af9b3d7dd04ebe1721b87c18b8841786d4a102b036ed0c87a82b92ae2. 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/TWA511300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985f79a73ae5d67d5bbb087f45689350692830e817eeccdd96398827db732040. 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/TWA511302125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ccdd575ae557dc64dd9adf7868273b1b42f135465ae8e074a9a17629400f16. 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/TWA511302126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101d70bd92deff94d940095c6920146d0bdb24798b68ed5b76856f84e030d82a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TWA511302128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b8b5e641f44ac3c7618a80e40d1c32bca2d4e9127bc870cdea62b6cb282f85. 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/TWA511302129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0e646b1bd99a9d09210a40fa52cad4481a82c54a674cd05bb2e25a75c3f21f. 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/TWA511302130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2539607693cfbb45dfed2a56acf80ba263e4656d2aa80da38275e5e254dbc52. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWA511302131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83c65f506ed114a0ad7ff99205649e034c619d884f3fb188d4d51f8ccaebe9a. 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/TWA511302132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17478c718a0454145808b6139fbf386d8ec5bd743a9e706f373fa0e36c7f112f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TWA511302133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5313b98c960173496246ddab13bb0acd51f7eecb10c0e090a96959d2c695c80d. 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/TWA511302082.