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 0x56366faf7092e1b92503c6f1340442944bfde2877b82e0392bf383cf161ce20f. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3858f758-6bb0-4f10-a21e-8d7a4410a887.json and https://artists.proofprofile.net/proofs/artist/3858f758-6bb0-4f10-a21e-8d7a4410a887.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 0x7c36860e1b898b71c1efd328375f8a351390d448124bbbb7f2198a9292b3610c. 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/QZZ762449450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467171ac4d4d96e4431552061718b70e72f234dfb7de6d1d4f080384a62732bd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ762449451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb46cfc49552979995bc6af53ebe814acbc0f2d752083d3142f25c6c0984b6c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:23:58Z), 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/QZZ762449452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27702edd5e0e1b10c711c9fe540096ff12495acd5eb6b0c215e93f84ac1fbdc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ762449453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de31043d785036979a11dcb8f6d5ec1ea591d8395d5bb8b714b55809c76eb7f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ762449454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110f3ab531c0e61f80b7cf3d4baa9b7b1946603cf3a010a87b0691e88571af37. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ762449455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf88842fd7a6f58abb3a03662f4605189ae347203216b08f46567b54095c5878. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ762449456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500dbd90411de7c1334ddaf203d5e2bed3124445ea39a7984656a10e19ad95a1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ762449457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53424fa91024ee6557dcfe9897c15647a14553f56d9dc3a52de077a3dc3bec84. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ762449458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8d65a64c1721feec0308563518f4a0a9a198c01a7725ece3f3eab5904b0ebe. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ762449459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641d5cc8583d7585b92183ab39ca6755742d67fb1c1483aac0425b7fa6b25350. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ762449460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788ea5245d19aaac530b790716272712f4f13f1f434b747e2c917901a4a329c1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:03Z), 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/QZZ762449461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb8e51c75fbcfac8f6a58d4d8733366b24c3713df3b77f9b7a57e8441e2cac. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZZ762449462.