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 0x418acaf1d777d820468c4789f520da65160a447645164a14b8596462e3909318. 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/cdc4ac67-fe93-4713-ac42-7b6b53e1369f.json and https://artists.proofprofile.net/proofs/artist/cdc4ac67-fe93-4713-ac42-7b6b53e1369f.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 0x7d1c7d96c1c0f19f33655a37c6079d726e5b3488d3ac0c6a09dbaa9b98a3193c. 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/SE5W32200956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31508598c22d684e1f0c523e988f3d8c36b28bf62a005bb785272043f9c1db7c. 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/SE5W32200957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0cfda655f7272ae724419fce20fd0ba31894e92a6f020c5007d395791643b4. 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/SE5W32200958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98950c3e1576f0fea0228cfd665c7064fab49fcbb86c571623f0ff5d9012276b. 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/SE5W32200959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1651665453b254ab9881bba233c9c5ad8f382d7348d9aef07d4d5d00f53c6ba. 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/SE5W32200471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bcbbaf51385a26b3afc0876b286ea18cdb0f0f0f53f9016ec8f24967e9f010. 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/SE5W32200472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823dc48ee1e3bc57d8c969cfc93e38a2e39b73124401b067858d8ae23b943b0f. 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/SE5W32200473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7951946372b6146bae24cd6d1ac31aaef30b5a69f60a595da0292e1a815a3dc. 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/SE5W32200474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff47c66f724ba1a181e0988f27cba6f83eacf0646fb80cbc7ba5c1e0ac9fd84f. 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/SE5W32200299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0b3f16373a17ef7e858a34613fadce998e7ebae3398774a4f5a38428c2c539. 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/SE5W32200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce09cba748c90e4c04d1db2749e56aee0b034ab944e830eb21457e087b5a265d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5W32200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd2b59628b462f1f0cbbaac012590df02653aa389b3256cd58317835789c4e2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE5W32200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2546ddd7af44037a984d9c8fda58dca5024ba4245bc5347309ccb5cb8667e33d. 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/SE5W32103833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a1f0660345e89e73b25671363c8667e7a0e3fb667bedac9bef1c87ca0f7df3. 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/SE5W32102843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271f709313ae9f37fd3e2320a2a856af1d04e28817dfa0d018613fbd35b1309f. 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/SE5W32101487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd6408350f889cd0fa6e4b903134027b94647723a6565700ebbe9e275d4c175. 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/SE5W32101488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3ff08744c68deaa96ae13203122e09d70224a29bc97bfba0b0c7231cb276f3. 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/SE5W32101489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a034a3010354093f8cee9bfa6685586119d4fb83431dddaf2d177f9bccfb956. 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/SE5W32101490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71b95e7058dffa68745fe433f617db50cdb469c238f1ea24e894e5a03a127d3. 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/SE5W32100527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cc263d918be9b95ff4da99788a31774a94eb8184620b06185160985206772. 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/SE5W32100528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48092ce56c79538373b94249d21064e3e63f61fb7812b0527044a8a581de4700. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/SE5W32100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262dba42610ed348662d5be8eaad1f14fd700ea8109cc60fe170ef3b5aa41cf1. 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/SE5W32100530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a88225015a7a5419909165f68c7352a6c568626cd1dc54f8351fae52dd484. 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/SE5W32091003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ee95f054e6497859e78b38ba4f2b257ebe15e1318a22c2637b3bdb4001d4aa. 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/SE5W32091004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64b05376a415f0408d33df2a6a4c50ae317b32f7b92606cd13409c990c12317. 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/SE5W32091005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7ac3866d3de7b3c902419fd3ed03455218b5056e83a7f3e08c5678c141a41c. 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/SE5W32091006.