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 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 0x76895ca6c3400b6e8aebaeea12bf8ad915cbdd1239e076670eeabac4ac7a52ec. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/619a0e8f-c5fb-4e80-967c-e20f5de6234b.json and https://artists.proofprofile.net/proofs/artist/619a0e8f-c5fb-4e80-967c-e20f5de6234b.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 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 0xf69d9d0cc48f86bc4f218a8c33d864a1f5c6d87a1614373af660e3520677f991. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2P2340458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb024814cda5376d7195aa941bda469bb0f286694eb11ce796cf23d83540dd84d. 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/USA2P2340459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccd64f501ebcae023dfe3544da22da1677a0859923c7dcaccf26bb00674ee8a. 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/USA2P2340460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad145cbf71ef0fc0e722facc81860d849ab67f9dbc58789f982b64673571fbcb. 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/USA2P2340461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47c8dfa323be416f5f3665b8834c6b9ec2632311533293fbc3947922de5288e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA2P2340462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043d87148b73d577f4a0e553d1be9911c2ad2e61b223c47dcf6e4a14c67d036f. 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/USA2P2340463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e01b38b739a29fba83a0d8dbecc7052fd2a4b0765f977191488c8a31b5ec6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA2P2340464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190f3b4a2ef3d2b57f5420309f9861c4fb2f3504144f6787d3f74da7a7f62046. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2340465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd90a0d9689af2e0b41a0a9c20196b2f25ea3037d8222698387b0f4e42c39ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2340466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3f6d6d343dd607e766c9cccbbe2c5e75061392ded47f2b3de541f0f110c3b8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USA2P2340467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6f8b2530e233ea25c3127e610fcdcc3d1c5dcedf79543da572f4759e4ee127. 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/USA2P2340468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad76595a02dee1fd45838384664dd30ecd05336cb141b406fc25b061e735340. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6N21932996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b43bbe2926f305a3f5e2ff39a95a1f40f775881f6584e323f0102dc3d6b9c4d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6N21932997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dbb6e984163f7a6efb13d51bee2374f9dba2468dcd077ef326b9af19439bf0. 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/QM6N21932998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce688ab3ceccff9d43cb7e44a1a296045917a2971062856dd3f972b8e2509ecb. 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/QM6N21932999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5333b3f640bc2fa2e95d1cf6fcbf41a3ced7c9e2db9d8bc75bf4d6d92fe05328. 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/QM6N21933000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7588cd8d8bb6ef852976f6dd94afc37a9f3fae0807b02da3a1081a5b863f2e. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QM6N21933006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbda411d22bb1633bb64717eb8c341d05cb74c0c6744bcaf7d4e14d81942631. 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/QZRP52410526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d624a812c500d67fe55d7ae30a71cb04b4b0c86135c1f6f392d67f9204d6a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA41889300.