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 0xf775a23614080929f89936490c8d2f3aa008fa67987abac4728bc3dbf35ce1f1. 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/b94cbfda-a6cd-4923-a7a8-6059f40b092f.json and https://artists.proofprofile.net/proofs/artist/b94cbfda-a6cd-4923-a7a8-6059f40b092f.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 0x55a519490e1603c7619609e0808c7d2b089c6d0b84afb02327bfb29c07b659c7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCADE1746113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a28b982696334cfc681d88dc5a26a2cc017ec006fd62bb5efb0b3d1fc02c31f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZEJY1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da33f6801b2758afa5805a218db4020c0b6013b9f70c3d176b5c36b9a35d099. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZEJY1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b30877f2738b9ea98a2c60956ad9bd5339824852c5576af8273ee72a0340ee0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZEJY1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece84b7827ea689782c12a74c9c5fe673779673acbd94337614fdad0d390e10b. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZEJY1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0d4c2e723964dc1ba5bfd5024ac9867401bd7450bde9650ef42f6d2dd03e6d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZEJY1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b7b428587570d6a972416f1451098c49480b85a20b40aa4d942fd40561724f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZEJY1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cd775a7ef04290db5d81b844b036b7a3d9c2adb8d89e55b97100301b4f390d. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZEJY1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73c9cbdbdda20b7f8fbe249a03276567641321177c19cb0977c69724607869f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZEJY1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04ab62229ff1fc87b968dc657093cc79727fa40d1cdfebc9f29f18bfb84d0ce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZEJY1800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f29e0c4828036f704692ff9a272776c2a7e1a134c183ee0642c6dc1678d10ad. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZRP52152627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62280bbf5f64c604de24bce8d83547201e6fd06ee7e7326319b2ecf1b141bdde. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAJC2411934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff230487d19f478edfe40f8f23b0e1dbb85fc4b515a89dc4db12e8689f0698c4. 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/TCAJC2413027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58294db81dfb442a4c4dce7267716fac7d180483a34a072d6af0ba922ec61f29. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJJ2563111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b66854fa890445fcac87de8eaf19c3479f4e2de84d9126f3a7d9c1873bbb21. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAJO2514898.
Bone Bag (Live at Bob Baker Marionette Theater)