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 0xd1750bf9479d397c3783da1f38048c58f41b37f5e4046474dd4b1d7c50fdd98e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22729f47-f732-4056-8186-43cb044d9368.json and https://artists.proofprofile.net/proofs/artist/22729f47-f732-4056-8186-43cb044d9368.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 0xe9faccedb741b6ef30820aa25e7e103d62bd0d09a521a3c299095009cbea2d7b. 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/QZNMV2327127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77fdb25f71b886fe03c28fa55a6e618594004bfc05d6c99e148455a53411802. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNB82411384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fbc7ffeb569bda0a93511fc712a3cddc0d38fbd04f43b5e2b7745857de8268. 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/QZMEV2151140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c155302ce02633cd0b95f2b5cabeb619d7050935373a0bdcdad2feb6aa062c. 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/USA2P2100947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae8f4aade4a6136520cd3debe94234fec5035b7990e45579a60362a1c1f0acd. 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/USA2P2100945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27405c2c56444d3820988f5cc3cb7704fe71fa50aa5d5f760a812cfae0fbceb. 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/USA2P2100941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d41d5dfb20318dcd5e4843b6710319816cb9781ef92c1cd68cc690696b0111. 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/USA2P2100944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd03a0c338146ffd9984ffafb95c38c3c82bbeb59d91aa78441deb48df20c76c. 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/USA2P2100939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66462304b7c23475ffd5cf75c1081b8d93cb581690838887b4a6f18a143b13b. 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/USA2P2100949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e5302827656077788add0462218f197095e91d17fdfb1ea713ca7bba1b0a3. 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/USA2P2100950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1f73055bb5ef82e5583c3160c8e2b446f279b6c50f2c6f626c53c1c1bbd43f. 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/USA2P2100948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adfd015037649fc539fe7c3f300932630c40eb1c9ecf6ddedd5e4484c1cdecf. 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/USA2P2100940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2e9333722836ff89644da3f5f91eceec47bd128f201d34bbb36afb1db9812d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2100946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51953bca96b2a2416199e29a83c9b4915ff3e75de0df94be07418656bdfb2a18. 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/QZJG52071564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b622bb6c768d39272c4bc82532c0bb29c2af8096e86dc433d0885a612183f10. 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/QZJG51933676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3e595d38ec3cf57a36def44ad4acfd56f7b46ca70d8b1540b851ba3f3bdcfc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZJG51933677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b516cbccb44b38f5a1a649f082010bdae0be521c6506025d8789213baef62ab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7811102856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700c6e0912192c796b090f6f59940fe280a2bda8c7e3994342aaea04d488d2ad. 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/USUM72123506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3831050c2b171f69f5ee6c6194317d8c40b56d2826fed47af4c8b4c5beda64fe. 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/QZES52019360.