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 0xc82fb4bb3e7c0c558bdefac86513c7bcbab3c9be00f38b22015ec294079eafc3. 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/146fac71-0f76-415e-8f50-09df9fb00137.json and https://artists.proofprofile.net/proofs/artist/146fac71-0f76-415e-8f50-09df9fb00137.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 0x23c0c46e75be47c93e9ecaf79e3bc8de054e75b666c6f1b397361837463e1870. 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/DEAR41541431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8edcf5f36dd446eed8611d1898b442544610dea92bf33273befa0eb58d718a. 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/DEAR41541433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5be7eaebf8584610e791c8ed255910f187a22186c2c2769aa7082ce67212f2d. 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/DEKC42200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578da96165665deb08e3c9b34a7b9328e9852f3df7004a8e58cb643b1967f794. 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/DEAR41778948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a8f5032143e44d3e511013420e40334ddfe1c906754eb554799104f0df60a. 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/DEAR41511518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649d3636e48c52b046b5c5de4f77510ce1fd1778f9b8b83a2cb1438e03a2a599. 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/DEGA21401343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa758c431a3dfc7b0a713d207919dd88baa5c68ae35f7f02bad4036d14333ba8. 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/DEGA21401344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08551178c2d8c8eb4c41923b2143284418bb9e86c5cc340873b0ecc4da6bfe6. 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/DEGA21401345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6cd5d985b2fc3e8b428bb0d64464abcddec02dddd9530aea3917a32be4f3e. 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/DEGA21300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0571a27aa4afed243c4ac971b6c017b12bc1585ac233022b9ae0d95c825c96a2. 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/DEGA21300931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f48f16866f1d3600dd1ed2e7a1d26f6e14ceef664b8600fa4585620dd17fe. 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/DEGA21300932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8210b0c1d6eafb336270dff62df12927dd3bddbe47ba7f6df4a643fad815e179. 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/DEGA21300933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383faec8e64ecbe28ab1f2a1d34061da56482ec9363a51c494a4faf822b6b6b7. 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/DEKC41500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b955c71c45e5e7ff4a739f80f1aab3c683434ede8fed6df7ab8dc0eb83dec9. 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/DEKC41500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d959ca46100720c0ba773eee2d37feae25eef39a053688e02a028f8af88c3d6. 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/DEGA21301145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d918ed862c389e0de45b250476a7c97530a75187f290e56da52ca14eca812c. 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/DEGA21301146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383a951d025774b3e863822a7d4c17dae97302e5bdc53c39808e3ebe9019f76. 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/DEGA21301147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf083a403dddc29ca26f022b8e54d63d9c708fa2e56475af9ccdf40750b1fcb46. 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/DEAR41415813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d7571c86b90f42a8fed2a181c7afcf77f2331694fa9b520c48772e68987a2f. 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/DEAR41431299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14b40b12a0b68c154b4b20cb6d30de200b9727baf07c9b5a69e0775fade195b. 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/CH6540847910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900a5a19a41ee019da120367cfb4ff2cd97d7b43233cbe6a5e904d92e40a1bd0. 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/DEAR41322630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68f9288a05bbf1082daf07d1206f9dc176d9350042c2e6623f94475f82a8fe. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBBYB1301358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bf54162e445c2ed44d7cfebde898e9f3d191cf9cec71e7b1079bf9472d6651. 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/CH6540836495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d708e490f13bc7723103d02118f2edcf5ac702448c6094e63ba929c2bb55c02. 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/DEAR41950018.
Question of Time, Vol. 8 (Compiled by DJ Arnox)