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 0xda9a051b4e79e4790d151bffdf9b69dbc8e651bf78cd01b434e90c4b38d427a3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84c0ba4b-4162-4012-880a-30b0c18cece8.json and https://artists.proofprofile.net/proofs/artist/84c0ba4b-4162-4012-880a-30b0c18cece8.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 0x8a5cdca3ff3c820311f021538576b658cc24509b9dba342e1438eeb0c82cb0fb. 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/TCAHP2342459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498d8d433bcb30f989e16709828df93960330fa9de832a59eba9d085094fb796. 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/TCAGI2248001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2493d068b97f1e806e54396c07d01b3861c2e27d864c9619d0c0023a1fcd8c8. 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/TCAGF2241656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb315ecfa3f4903b65fc9cc56724e05e8b792b3fb0b2c5ea73be75cd29a1948. 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/TCAGE2258190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab9b8646a7410cae865ce1e6eef3ef9af2359f9bfb7a6cf2955376f3e181a70. 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/TCAFW2137256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1ca0ff8162ddeabfb84fa5519cbcc261eeb46d59467214b02a634fedda3c73. 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/TCAFG2028224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927c125a46c6be2e1039cc94c28203b09c22df6adbdce6faf19eec628a7a70a6. 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/TCAFE2061869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a9113e6ea1f362ecd6ef8b4f175ae7a37fe3e2a675a61a5d24890531713731. 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/TCAFE2018087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073bd4b379aea550851fb697ce0d09736d3661b720bcce26246477ae5a9dd8b0. 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/TCAES2034229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c63e35f3f5f8ea456599454a070721c5e5c8d0705d23ae1ee1154dc4971c58. 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/TCAEO1909859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6075d843312b62705186454e6d7fd0fe09e5a2e6d69321fa6683838c9bafc44. 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/TCAEM1973077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a56e67945502ae21456293d23b0d05fa665eacf2c02c2bd85961b1703211852. 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/TCAEM1927922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1cb26d03615e4bab0365c45038b0a96a2012f9bcb1e8973e95d8932c31addc. 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/TCAEG1969212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768d545625bf3e76cf2a12b32cbc9a18f9762756dfbb7e77c7febcf308a62762. 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/TCAED1935715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df6c9e4770ed4173a2ed69f4ae981a053610657f447f42b8d4743b849d33b1. 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/QZHN61908429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9f7dd3b453854587401f939d145c6cd69b0057835bb84ccc568365c9c639d4. 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/TCAJD2470736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699d70b4dc3e88e30772bede466374034bc7640cf6a307e09d7784a4d97b30aa. 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/TCAJG2589792.