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 0xb7097d213b4eef8783122b65e80df2723905ebb6e9a0ee562b63b06bad129010. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77c26c0a-f235-4e33-b2fe-8f8da098b415.json and https://artists.proofprofile.net/proofs/artist/77c26c0a-f235-4e33-b2fe-8f8da098b415.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 0x400d22bfff7380d409c1b9472b57dda8abbe27e565207941e7fba586068c0162. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:48Z), 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/UST8K1867040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1203ea93ffa06e6a9999e9dbfd4f0d0d92ecc445e2008266ba16ddda99c3a37a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UST8K1867042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020c554494c641943c7b6011d970971f78fbe03407b85a4cd699d2742d5d814b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UST8K1867043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5feb4a46756f2ea074685bc7855c428be9a00ff74edcb48bcefc9af8a93854. 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/QZES51966581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5bb2c77ad76bb956216b1c0207ffaefee2f28328b3b1ea632781201a8c1ce9. 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/QZFZ41939582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbe601d5fbc19b583fa8f05400083a94024c4709cb7c9c07cb5bfaffcf16f1a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:05Z), 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/QZHN61973788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03dd788013263360bfc970e1d7f4a6de1df95bcfdce3395f42b9d2fa0610bc. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:05:00Z), 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/QZHN61973789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6b58b35c9a9186cea0270edc3ece6a189ec52fb5838801fbfdf7f569878c4b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN61973790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e99e34de582b2bbc5e4fb8ec2db5933b4f26a5a29ba7e8c10c61de57788bc7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:24Z), 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/QZHN61973793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1192b65ad3a4d90e523b2a38f206b1039d3e4b68253ee275fd1ce8c777b5db8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ52070067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91af1a2019bfa4450f86383262326b4a836d4680b512df622c2f5c6b7eb0a652. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:18Z), 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/QZHN32074903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88c6b6c11b99620e0b3c45a8bd020721e3e19639cab5f38ea2c7b637f576cef. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZMER2011229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1da32a97628ba6078d65e227acc3a7f02ace0055afa2ed4be3017486492f686. 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/QZK6J2182049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698b8913d067dcbb0cff502092b75085e56a0e31bb994c623a5e28dbf534c962. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6J2182051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b274ccba2cdc58be3dde97ade9f75c8751ed7eb90cf0bb18ee0b136589e279. 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/QZK6J2182054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc072f71880db48bdb6e0bfcbbbeb3aca08884ce61efd5ad0e1b2914fa6c3878f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:27:19Z), 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/QZK6J2182053.
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 0x66a2825b7c5d836233d15678c04e43876ce10ae57694195d55bd50590e244769. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZK6J2182048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e876f056aaa1338fad5a86e07c474c73dc472cec76fbc3bfd89cbef482f56. 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/QZK6J2182050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6180be7d68724806aac5e23671816797246a77d029d213b3e75640458240d3e1. 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/QZK6J2182052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b309b77a11792522063755c3aaceaeae60a1a6d1bdfafac24ce62a8fd74c1be. 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/QZPLS2104238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0b36df4529c69f4415d03126d1f638158f42fa04e053fef6cc5b17c6b8799e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:34Z), 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/QZTB42202573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5f8cca4961b6d8316e4383f8635420d00eb9e1587fa6a0596fcb183ee87fe9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA82468077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89e0693a1d1025ed4d63b79eb0ef30d7bd6e829af71cf044cd103dc37bd6c12. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA82468078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fff9f12842c4716ad376e37ba7b240a8c815c2ad0f8356dd4f42b302d3f8d00. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAGN2245701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecce14e6b5adeec6b990d53707cf603c34fa7889634dfddc6bbe8273b4b9e93. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/AUMEV2450026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1961c6691d51a77b1da6790042219dae2d94f1e23e7f2eb1863df523256a6d1b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/AUMEV2450006.