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 0x20e5c0a7727e5189121f9ff8fc3b89f6dd512d6cd499e89d95c835c51a479194. 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/d9d2fd27-db56-44ea-b219-5b93836f34d6.json and https://artists.proofprofile.net/proofs/artist/d9d2fd27-db56-44ea-b219-5b93836f34d6.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 0xe666295c7355fb9188f352eee0ee16de76e9dddfb862ec478e011e7421cac8d4. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:33:17Z), 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/BEFZ41600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc064049c7a1e4281b7d198f9c094a0342a77c444cefbc29f5270245c7d8c4e75. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/BEFZ41900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d9a038d887133680e75320e7ba96b7936bb23910f36e825c1fa3a4d27421e1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BEFZ42300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746be58d27b9545d8a6a427bb127ac6ffb894cc110d9fb203397c555b1829218. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BEFZ42300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3966538c6d5b42f8a5f3b90f969cd2e15e1f990dd185758e92984a80d38eebea. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BEFZ42300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494aafcd8af5a6520416415952560e62a1b27a6eb71ce4664b3ad5f4ea999744. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:22Z), 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/BEFZ42400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d9a038d887133680e75320e7ba96b7936bb23910f36e825c1fa3a4d27421e1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:51:37Z), 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/BEFZ42300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102fbd1b287f7f4500357e29bfd4d22260ef45407999134335da156d29bc6e89. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BEFZ42300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a211cbc5d95a1d46daab24465c613f858db8a015a6f029b735ce55cb15e3742. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/BEFZ42300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746be58d27b9545d8a6a427bb127ac6ffb894cc110d9fb203397c555b1829218. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BEFZ42300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3966538c6d5b42f8a5f3b90f969cd2e15e1f990dd185758e92984a80d38eebea. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/BEFZ42300010.