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 0x1f8e8881572765de8c0f8adff01ea1bb4b59cb9d0727554ab4c34ff92be41425. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba7e68b5-1901-4cc8-91ba-339b7422d175.json and https://artists.proofprofile.net/proofs/artist/ba7e68b5-1901-4cc8-91ba-339b7422d175.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 0x565f83fb2c49f25969eb2b80834e35a89841b95a1a0666d99ba656fa9ce7ad78. 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/TCADI1741764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f97cc70b50f8930f4a7426a7e82608646bfa5b0202b47887e8b889f4a6dcc77. 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/USLZ10553302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e80616ca0594fdfb532e08eb95af534453957631f9ddba5ed9d67682d19fc8. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USLZ10553309.
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 0x0aeefcb60399ccaaba161c364287dfa27126317d250f0e026a44dc719f3f0683. 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/GBSMU1559580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b05802b0f104e13079fb8e7eebd3821fd0c68aaec2b0a27fa7cbdb4acee836. 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/GBSMU1559536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210cd87763aef66181a3688024a2bebcb104066d669f9cc79f8efc35c41b1f3d. 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/GBSMU1559537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4ed9150c453cd30d67d8b8aa6200f98594ec7a749146495540e2a8f1e5657e. 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/GBSMU1559540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb602fa29ca87cef6b3984f685f6123bb40128ccf1d244ae1612968e176abe2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:21:59Z), 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/GBSMU1559541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a2e8f09ed4a8db7d7c1e63348f6654a31b467310cb33a833d051634957ac72. 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/GBSMU1559545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b51235f5bb356ebc65c3b60168c88e23fd0902ec5ed56c443f940b84eb186a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:04:54Z), 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/GBSMU1559546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4b50505de3770323b3b30deabe4e5a96b9ca75c120c20855ee8289ad363a5d. 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/GBSMU1559548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b68f6ce0ccf1acdad9c07f14a8f6c5f3dd498eb3cab2907866aab546c7356. 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/GBSMU1559549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae2e79459b3bc572e47aead9a130549234e5fdd707f0d1eb59fb8461f4059b3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSMU1559535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6508f902c8f9528d125f1b390767d85a54a6f81bdf6aa4e877e32474f660d9ff. 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/GBSMU1559538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a435544d8f57e148661fea36c89d6dcc0177db9f7dd4aa3a8acb6b48036335. 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/GBSMU1559539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74396f43ec40af6ddb3dd64eb4c35eeacb0ad06aa48d2a3b99d7d61d93e1ecaf. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBSMU1559542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ac76ebc1e7c10cf76a633f0d8fc6b1bc378b0c1ea9cdf08cc38e95d630f762. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBSMU1559543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385681f07c7b866aabcc6a52bf4f89d0e25e5867261d5becc2632264cb5e66a5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU1559547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5a0c9713fd9d430a38c995da3c7e66a342b6f4ae56d3b7905d465f963529be. 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/GBSMU1559905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a2a1093e1044c1b744c08601ad85c625aa93b1e61373875ede95b1b046f1c8. 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/GBSMU1559909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908fdf10d31755d540072af56d679be67b7c47d157eb23adce9e23142a0d0588. 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/GBSMU1559914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0450d36ffc851fdfa4cb41412e64bbc7f0ce9fa378852934d4ac83d75ee84a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBSMU1559904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b44e63049a38077f5c4063fd2bbf1fb0ceceacfe7660329fd59987d4098875. 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/GBSMU1559906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f137bb9287df98b423ea72b2afa63b6b8237924790fdd003e4f9661ba4d8b4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBSMU1559908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa549979612dd16de3150eecc28892e750c4578d7d31888290484adf3aeea12cd. 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/GBSMU1559910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcc4adee790486f8d5d0fd90d213c3d21c6babb6bde4ca35f355ab7e8b5aae6. 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/GBSMU1559912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9c2163273182537d9d4d69535e6f35938c7ff48ae9bf421f03a6a30d5cb273. 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/QZQAY2280841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71d16a45d64658230d46001bb99dafc5974087aee600e34f2a1fdba88f9e95c. 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/QZQAY2216243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40e8e2cde206e4d5fbfa3c61db917e44202462d96a9da95e9285826b6f66e73. 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/QZQAY2288981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03b1b015f2820a6a227d6b742c4771fd9d4f377e758fb6e97a561d98724e0ef. 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/QZQAY2283790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ed4c7f66a6cfc3972d92f1039cdd4a08b0f4c4aa7c1abe83bf95e6f306d6c0. 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/QZQAY2266256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c43376baed58a7bca47f2197db5300406a3929391d00e3d9fd6970fd8d1f299. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZQAY2272365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85961399107c1b41bc810c5e5806a38b178be6eeb5c5ef05bb16b355b391f0e. 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/TCAGE2278294.