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 0x1423dcd4e043e66bf77c173b1edbe04441042f0477e743ebba1ff83283b00940. 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/d7d9c4d3-edab-4bff-986c-40475b1a7d3d.json and https://artists.proofprofile.net/proofs/artist/d7d9c4d3-edab-4bff-986c-40475b1a7d3d.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 0xd926f75d555f5f3d69a41cbc79b020a353c1b893196c9d66688fd190b994afd0. 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/BX3AW2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb796d78a2752f8aa859105e77e2ba3b56877b114799cfa31b52d17360bdf0c0. 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/BX3AW2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7851fcdc758a2b84713e3a5df079b161e75e06eb15238d5db261a636a5535c. 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/QZHRC1900468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cae86d0615a43ba7603fa705b648019b71b0bda4819bd007cfb20c704f2199. 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/BX3AW2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2bc62f08cd52f7ec88bfcc31034043eab25772dbfc140e9c02382d54d43ff6. 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/BX3AW2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa759d2ae08f89808fc75a09dccf36e90a723259b3b8876940b1d332d023d053f. 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/BXKOA2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af7b81763b66d666b98f54e53cd16a5fcd70547ec63f54708d54a627d6daa08. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZ7R42052950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf95f8c7fb8c40853fc3d8cb48d7c252fc81fc48859349d3d28d7b3b7eecccd9. 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/QZ7R42052949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41386cca68e133ce222cf563a854abdae231144257fa8989b7aec1b7c146297. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX3AW2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6e8976a2a82951f68df1b4830bab63fc059534dd1b61c0d8863bfb1db75e24. 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/NLRD51831647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70c5e87b15a7188561b9f3491983468f5e78dbf64cd8d3fd36881606fdb032. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBKPL1952452.
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 0xdf42ac1d0174b957da430d68f2cb042688e7cb550238aead7de2aec8b2f6e911. 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/USQY51754235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55dff12d122abb0ad3a07e4bc183b5cc28ffae083866c9da816399e1d49e530. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD51831718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab51556434e70f970b751c34fd157b2a22e053c0f94c0870edce4ad3ab07303. 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/NLRD51831881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61d182fa924ecc71c09831c3b668580867f56fdac0c5a883520a705e678d06b. 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/NLRD51831486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137a5f3d373bf426cffbc9c089b11a74ee262db53f8ce5488c2ee43492001f59. 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/BXELK1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403808ee2705b9f5f8df91c3fad40b1358bb4476a19dca7e4a7c2bab84e51c46. 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/GBKPL1514248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ac846dbdd3463480cb0f2414b53ae302278cfbb0008e47283bdbe4b0c83d46. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBKPL1514250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f76f72a4c9a957f7671434bc231726e58cff36256aaeeb4bf85477821cbb2c7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBKPL1514247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf791ddc368a773e519b9327aabca756fe931030a87603c7e0eef0591419eacbf. 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/GBKPL1560724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e67be4eb49240ea2cee8979473be7363072a483603697c40834837f3089f366. 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/GBKPL1514249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32992e85747e05f6ad6fae23b61ad13c9c1ef3a3f379f4f15f424b8c8147891. 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/GBKPL1416492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff49af89ce2e097a399ee3ff252a41d42730e7f4dd2060ad5fa8a1578f161101. 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/GBKPL1416495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0d61cc3aabfacac36755f65c9656a5d0317161e0d7f481d68ecea13ae4e4fa. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBKPL1416493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf98d2f59fc24e6f244532552b4c8546e31c2f3e74bc5fa9abd830563b125d59. 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/GBKPL1416494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf36be37d6071947ebd778742b3df64acbe07c497b7b2816caccabec3e8cebf. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/GBKPL1416496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc166cd30dfd40963b6ee979160b5c98225b5298114977977d0adfba6856c9008. 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/BX3AW2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fce3d8d4d68c6f78cb3dbdfc41ceeb872e44d3753c376e4367280e71bc1cb6. 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/BX3AW2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfe2defdc5f88cd9e16ccf98a72dbe4bc9e84c2b97ad4fbaee400c3b9f9850b. 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/BX3AW2200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f7258474ccd2c24fcdc7bd31ec8e5f2f9f2dfecff88d32e882045fd9d8430d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX3AW2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2d6fccb91b65e5ff3fefe37bc5a8463d80d7bed3163cdbfe66ee86a4fdb2ce. 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/BX3AW2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a4804e7dfc46e2bc1d73488d0a4d5dc16e1701c9cb24c3e1163e6e3f2cc02b. 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/BX3AW2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115ca04c00691be2f53d35d89eefc3793f6a525b3ae9b3358da5c4da6d9c22bb. 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/BX3AW2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab5795d89213f66945fc5cbdc25fef8a66309e04f180004168c601a22adc63b. 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/BX3AW2200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5108664fc2598f6516874d5804e86da00636d021f662c39f3e88ff239439a1b. 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/BX3AW2200063.