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 0x94ac1e5ba5ed1a62426fdc57c9fdb6482195a478931d5e3be0fbec529778e353. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/729eb531-2e4b-473c-9684-84b5b5a338dc.json and https://artists.proofprofile.net/proofs/artist/729eb531-2e4b-473c-9684-84b5b5a338dc.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 0x13f4450825098a9b36899f8a1b5b2c72c5de4d0f1bb4cff372056a0726aef94a. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCAGL2210107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e340fb24a8872c7d85d4c019c2af0ef527d04dc8a6ec1bbe32119343e4206b. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TCAGL2210114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b5abc0a56dc599f24b59740c7a2fddc78abaee92b813e69c058743ca0e0e13. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAGL2210544.
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 0xec4d3bbd0e1a5e27dc9cc8966008d04ea0c8e38cd9f4323f0acc3d0c6cc83221. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCAGL2210091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8eaaeb52d714268cbe180cc58520317e5ef92511a39bcbe83a794a300c8249. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAGL2210104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f9df4b72077457ba87eb9fa21131c98e663c75ee2543df8c201d4289c88c7. 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/TCAGL2210109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d65413cc961ae9a0f2dcfa58eb9ba5da0396d16ba3ede711b495c15fb97cdf. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCAGL2210115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777998179194c2b34df44cd90129798f3e044e71f3f44a4cccc2d9f2a800f8c3. 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/TCAGL2210118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c95a1ab00509cb5a61440169fc660f44ee904b563e778f6b9226ec1d6ccdc4a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAGL2210121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a33dbaa6206ca5b30d5bbfbc252ff0b38499d7e42f719061f66a6a9307d2c9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAGL2210127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7e31fb2405bc293d38b00570f77b4b014cca89ece0c48dabc7b1a4b7b0edaf. 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/TCAGL2210130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f5ea1d96f0e8df447f35c2550b6ebd7b7228d709a1440c652c40eb0b2b403e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/TCAGL2210140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06f8febf6d67fcaaf4615de85ad0b5b64e5f40de88ae45afaf09416c31fbab. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCAGL2210143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14d0189132e6926dbb534fa2a044cb0f594d9c82b91d2fae8e72d4b6fb97497. 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/TCAGL2210162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0415ae3bcf7093b4a75899c6d36454155b6bf35be4c91982d5649efcfb03c601. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAGL2210603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb74f142438e6e271c350ea5818997584921ba76ca82aa19dbdac9fc54a0264. 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/TCAGL2210607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51074f0aa9db9f3db76ad22d76ced53f71dbcc05e197de66a91265d7264b53b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAGL2210611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133f5d9887c058cc7e5e6ec0f531774fff4bee80d1aad1ff1af7e56b36bf132b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAGL2210613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc1bcd0525b04e284f7660bf2bc17101dae3fdb3609043a0b5327308ea9cdea. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAGL2210616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c9e3d3c37b462fe89dc2efbc93cc9905370426080d785e3cce6d04a953dec2. 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/TCAGL2210618.