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 0x46c9351539b5984e112d31c41d819e95448314e23fcbddeecbcaecd24b96baf7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ca66807-6ccb-40eb-931b-3944aeb92e76.json and https://artists.proofprofile.net/proofs/artist/7ca66807-6ccb-40eb-931b-3944aeb92e76.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 0x7ec9595f97b2862d05479adcb6a8b1fbc4eecc8945d1e3cbb310e4ce53da5d6d. 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/QZNJV2399870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b6fd7f94c98fd8f9c7a64a217dfc27aaa9ce6aff5aa88d3898631619edab76. 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/QZMZ92267081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863d8e389589373fce1331aa7c2a2f2fbd7940b7e25622ce601ee5b8e57b375a. 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/QZNJX2178900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23670a8418ae3919361a0f36946e57ca7555f410c045eef00d3474f7b8705dbd. 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/QZNJX2102558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95849c2f79254061873e15e775449c9aef1087ea1913f6324e53dbc46bd210d5. 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/QZGWX2096694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247821fa8abaa23900b9d4416f7d24ebb7ec7a2ea4f351a2cfefb70636428c06. 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/QZGWX2083735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4443b631678574c67f188a626088b64cf1e818029e266bc095d52354585ea45. 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/QZGLS2174623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba30f328348ba2084f30f3321a443ef5379d6d6b40ff97fe9dee6f020fba4fd. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/SE6XY2556908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec9595f97b2862d05479adcb6a8b1fbc4eecc8945d1e3cbb310e4ce53da5d6d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2399870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863d8e389589373fce1331aa7c2a2f2fbd7940b7e25622ce601ee5b8e57b375a. 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/QZNJX2178900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23670a8418ae3919361a0f36946e57ca7555f410c045eef00d3474f7b8705dbd. 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/QZNJX2102558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95849c2f79254061873e15e775449c9aef1087ea1913f6324e53dbc46bd210d5. 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/QZGWX2096694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247821fa8abaa23900b9d4416f7d24ebb7ec7a2ea4f351a2cfefb70636428c06. 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/QZGWX2083735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4443b631678574c67f188a626088b64cf1e818029e266bc095d52354585ea45. 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/QZGLS2174623.