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 0xa4543bad67f2dac49362ccc8df46c8ab153feaf7aa763582f5f5ebf952709dfa. 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/922992f6-3f13-4598-8cea-3e82959c3e15.json and https://artists.proofprofile.net/proofs/artist/922992f6-3f13-4598-8cea-3e82959c3e15.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 0xdc16a6920c725859f5bd7b0fa85b34a13e1b0bae6c5e7ffeb31daafbda29b630. 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/TCJPS2287253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03be19b580bf5067ae1b4c4c5f8a8e0a48b0b4c39214335d77ecff77773c034b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCJPR2247357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01743d8fdbc4fb31300f8bcf2c6325698caad000768e9faa3b28b42caa51ca2. 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/TCJPQ2172990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75afc4c9053adaf3d222b8af1801a9d5f2e73895074b26a8bbaea91e74fa4526. 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/TCJPQ2145363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9196472bd2395bc11479fbdbed6061828b31ed9ad5d524a73d72839a023c61. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCJPM2004003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf291f4c0d4edafa439f928d54e14b89fd859c77eee97979c51bd58fafd491664. 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/TCJPK2070030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e04aa217d007f2d9073f3ae0bb378b14486b78d7d63a7fb67b118b8ae62355. 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/TCJPK2070032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f45b4425330e7371b166c9ab9f42f66974001f8a9bcd37ee738749106aa8a57. 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/TCJPK2070033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c802e1d698b22dda1d972aeb0f3b7ac5b0ee70faff9e4c2846d86d9d472898c. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TCJPK2070034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311a355c17a37e4cf78c54d2013abeaa565cab954d9037a2470eaf20698563fc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCJPK2070035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9577d05ccff978cfd0cb8eab8c538fed5b75034ca40f1c77d803985571338. 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/TCJPJ1997975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d4636ba492072ff267f36703795b5eff384a4ef42dce36597518bbdeca8f5b. 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/TCJPJ1997992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec3fcc975913d2d5bb34eb4cadf78035f86aa105c29bf5090b2715f55138c2c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/TCJPJ1997997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7492d3f9ae263146959f9841948a2e7682aa997cd0baacbc7eefd40846c64f. 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/TCJPJ1997999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51268315fc0fb8dd44ef6d94886a7b50cada85fd38d41cc6d7de62be9a0dac91. 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/TCJPJ1998002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833be80719180313f0032c4f8f86d6cb0f04043944270544b8a574e4e8d4d0b. 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/TCJPI1805662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac85f0918732ec1a44dd062684de1f624b0d4affacc87fe954a35504fab7a71. 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/TCJPI1805663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c8f9c67ec4b4168f2c3fb12181c08cfb72a528aa5b1f6b6d29e18227d828a7. 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/TCJPI1805664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067eb4eef797b593cee26a6201fe6ead568b7bb0659279036412c369b69a5d23. 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/TCJPH1876434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4628753d084e7fffe0733d5f5cd22781d8f6cfa6a0f18713603a524cc5aadb5e. 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/TCJPH1876436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dede183c4896d3030cfc855dd3d0e0e3fa3889c7a895fe83e883ef679a2c1b0. 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/TCJPH1809791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d4b0ba0a750bcaf03ac0bb226c7fcb71f480490dbfc3459c8dff3a1c884fb6. 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/TCJPH1809792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea628bef03028ea6459e26760f655b940830f7ef713e57f3fb99aa05aaf820. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCJPH1809794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf097ed7bed9ee24795026bdbd12e85a060d2ddf0edc7b8c49a84cf20a5687ca3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCJPH1809795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbf654810865aa0b145989568f2e24871ceb620bebed4ac7dacc68abaffbb1f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCJPH1809796.