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 0x8b7376e0538032af45edd9c659f477c96e3a7a15b08b59006bd058849f9c4ac2. 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/511dd9e9-03c8-45bd-bc48-9ab3fcd44fd3.json and https://artists.proofprofile.net/proofs/artist/511dd9e9-03c8-45bd-bc48-9ab3fcd44fd3.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 0x011169f4579d10795e398a2431986d89b06c6e9fd7895c5d00926217eb220617. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/PLC062502679.
follow lonely crowds as clouds will come
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aa445f7d5dd1eee07d338dace5c90dae6f19d82ce64206daf051ea2d16fdf2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLC062503001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76400cabdb07cd1f05ef059bb9305babc6acaa2a630b365461ac3617d8d7bc2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLC062505496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8f88131e2211fc9ea506595c7b2967bab4d81f60f2bf16111899b7d8917dc7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PLC062507045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64673ed0b21bffe6bdc45fb10d351dd8e2e1b3fc48fb33745f798c4ba998802f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLC062509529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e6865946853f206415ffeddd063c0d1f472d4bf98060c2886eab0d5e04cfc6. 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/PLC062511450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4173bb25ce1c392f20106061d6f65d5effc59dcfd0deeccfe46db4261badc9a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLC062511451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316d08f801257d0dcadd9fd490cfc039fda469df6455364ed148210a24b45e68. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062516196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b690450582a52ad8370a3ee0db05b0c78a47169987e2cbe1d4b73e17668a6a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/PLC062516197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd97bdfb200f7fc44a0f36b851cd4063468a4f79b9ad11ce27c03dd29295e8a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/PLC062520230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288326e64a8c1fd4dc8ca47693d3ca4509c2f25cdf3b2e2b0768d2497d87b6c6. 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/PLC062521619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c06e8fda4ac057eee9cdfc3fd6519027fdc813c10d281b80ac1c2c66f3da6a5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062529130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96b027621557b42f0ef97258ab33982bc1b863cf9f5bc54d0ea990ff1b72648. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PLC062529630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da6d645e23f04603672dde9fab6ecac7aa7b270877a0335cca012e42a08b3d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062533598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62027b23db5c34a8d2e017495d4f9fdbd76ba02782ec083aaff6e5fc367b7fb5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLC062540413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5af51389e4849f1cbc0c6854c6d2ee4f0cd6d5c0c76c0d7cf69eab1dcf560a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLC062542108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d98becc3a6457f1c6c7517226054baa3086ce03cf42b48d33341698b6767f9. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/PLC062547298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b2efd795c135ae77b8bd716623b2c9af76606e37858d0dc7bebce2d9665d98. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PL4K02505259.