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 0x878e336c09c31ce5655f4084347a3e0a571c6d7679fbac362c9ca8a8524512e2. 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/6e296c9a-4d5f-47c1-a023-f81b733d228a.json and https://artists.proofprofile.net/proofs/artist/6e296c9a-4d5f-47c1-a023-f81b733d228a.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 0xf1a2713ac35a665cf397a1dd7f4b7ecc5967eb1962a9932280018015f8232739. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZDA51856076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4038ff425dd64540dda2fd48703b7793b97e3452013cbbe3defbef07c110e192. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA51856077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4343ef9a5b2cbe349cf222a8a8fea8827252ebf4ca3e0f85cd9d28ff1c98b89e. 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/QZDA51856078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b49c8005921cd0beccc043fa4b1d759661a3a8a60e08433df92b1ff0d39a80. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZDA51856079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1b4fb1a1d06a977e1ff6a6ef97161030b5d1577cb4b4f561919f2896d1b41f. 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/QZDA51856081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d9807b67239c5e389715afa99526600914342428a40c9e090ab22a215c03b9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA51856082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eae832dad5f67d361e80355027a46be98ad78295209815a5802f3c25b7005c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZDA51856083.
Split Catastrofy / Kaar / Exorcizphobia (Only Catastrofy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3c8d605795c9b39cc45cd45e778d114e726d8033c5a9ab243cd69da4097921. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZDA51868196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0343c28438cb3cad32ebce6fc339a3532ef19c0944be948640bf0d7bcf116aa4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA51868197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140a9a378b227f109bdb9197456c41ca0462d46cd27494af615d52308f373e54. 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/QZDA51868198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea8f058d8ee3d2e21feb5488ef413d3352e50691f939c52a8c6b4c1826fdb71. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA51868199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fab18805f2f2e71e6a2d68d23d4491f742d3c37e029cedd077c4ed1cf4a30f1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZDA51875288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f8be7554c5adac2307b3c168c219b3d5d5fc3623ebc49ffa3ff00bc4d41f77. 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/QZDA51875289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2109e0cb51cfab61fc3385c694a059a64aec7b856ec668eee3532578bbf2f9c5. 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/QZDA51875291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6068254eb519dc75918cc348d1cdc0724589fda43ec95e9640c0f7e6db9c01e0. 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/QZDA51875293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d41d7317122c10168eb9a19ca203dc4f33073818cdb75fda22559642952647b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA51875294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3082a5d53d6525712c6abe7e058b1e0346bcddb9c2e8efc20e51b9445f506e4. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDA51875299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea420f3b0132cb9a0fd4cec72f9489a58b1679800986f001bcffd3172494f2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWR2130451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c3a50d4bc4406e14671e42cdb8e3798a85c84d6b32e947eaf69fc6655063e0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPLS2160578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ab51c6504587c344f53cc218f4602cb21b6df68eea1d0c046264479e17532f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZPLS2160579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c84ac01e325a9f3d4163bf52b23267ccda74435d9b770d49f8b54d49eba76. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPLS2160580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac322210d82bd94ce45b29a31294d7683c89245ac637749631ae73d2e1a09cc. 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/QZPLS2160581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c1e479873ec198c5fa66a753133cebfecbb58de2f808964fd3941f0f560377. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZMER2117818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba866abed21b92ad1629e103e74db40051667935d995f4e3e6071fbc6d4cbb2. 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/QZDA62328707.