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 0x5d686a122a1107cd82dfa41b84a142da656161fd5f410264c7d2373e0b8697cb. 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/22cd2ef0-fc2b-498b-92d5-1e7abece6902.json and https://artists.proofprofile.net/proofs/artist/22cd2ef0-fc2b-498b-92d5-1e7abece6902.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 0xa1dca70dfdf39bef792ab9dd60881d77402bae9eefd6f966377eff6ffdd8507c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP52301193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed38d0bc93a63e1702fe8ccf9e4ee438f1bdbff7f0dff59de046982a5055a75. 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/QZRP52301194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb0d0764b5a551bfe4ccc67ccbbde1dbd6dd6af540efcbc1da90c5b1c159677. 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/QZRP52301195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6a726ff3898e9615b867c2f1b5705f85553b3574c6f0f35fdc62c0242aee34. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZRP52301196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9888edd0c32b3afe97afaca2ce4add443dcd919e9b7c6131f0ca8277d7c0f4. 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/QZRP52301197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452550420fa5ca8a8d7608355e309b5eb20965219fba7be40662c83258775fe1. 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/QZRP52301198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419bf4d07cf67e230d9dd44594f10870c824003a99e8dbe9ce2497ef856742e6. 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/QZRP52301199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2394a9e4cccf33afb2147063dbb8aed6cbec134b7e7c88af2dc9ad1c70a07842. 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/QZRP52301200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4071b43a96323d213c278d622e0a3579e4a981802f9f5129f5806b8399cc4c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZRP52301201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe31135c2bcf4164f4009e98eee8155bd76e34a2eda0f5b51d7fe4d1c6c43c9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEM2376880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efcb751a7a14d9d46db430909f2c39dc0b99ce79998f641c0a347198eeafd2e. 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/QZMEM2376881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7fd162bd2933f456360d7766dc4bc616f0f1821c2db894cd193d940de16087. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEM2376882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc3a41f8cecb185cd70e969fa0648a15ed7b8a74529078c3793882c15d98b01. 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/QZMEM2376883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79df5b99024c84307ca1f0035a802fc65957786a64f657a6bab52daf1166bd8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2376884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8026bf3f468307ad8df901c264c79e27b26e0d620ca660fd8bae060ecf085. 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/QZMEM2376885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10e3e4576cb62abddcdcce5c88dcfc02ed572da0e054cc465bac5944953dd4e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEM2376886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f93c89432b804e199080b1913b8f1a873614604e3dc3cb84097b493e39434b. 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/QZMEM2376887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d32f179191208dd36a28bc24d5ac794d303b4575a80e8740cd12c2f723515a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMEM2376888.
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 0x04e59799e5cc8468a77af3f7bb5d128d76f7ab1857cfb2281faae402dd3357e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USE7D2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9ef6dac7401c56165b5fc3d1df6e0b1b9900d49fcb064874a03cbfacc4ce99. 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/USE7D2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbe15503b97b61f1805bf8a5c3e29b7833372f66c81a3734d0372349886d44c. 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/USE7D2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51e0f7ed4cf0f7bd7e201ec0d22df02a61c9b1dc0ddcfb894e798843c855bb7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES92346868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb973717f0b90dbbcd73b4fe07218d0609275a48e90665cd6cf8768dd19d0d4ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAS2255703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72db118c1f09e009be159a508a5151df26add7805434d5397af813fc8ce82a26. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAS2255704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14970342585fc51e40c18bc2ad0e551d22fa7420d802458a2e6e71f4709096cd. 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/QZTAS2255705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f7aca04be8c9aa146905152210a43de7d4a83a40be8eedc2845568f578928e. 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/QZTAS2255707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82e561e92482c6dd25ccf4196ce392ad1d8cc5c2c04fc60c91321f1d8efe8e. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:17:39Z), 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/QZTAS2255706.