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 0x7d8e3d29c596c2e19c9c2020540acfd4144971846d8aff416951a2892bf859cc. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/baf3677a-6f68-4868-b399-ebab130dbd94.json and https://artists.proofprofile.net/proofs/artist/baf3677a-6f68-4868-b399-ebab130dbd94.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 0xe8a003fd193fbe16084913caf751db067779b5dbefe7d6860d4377e183d20e0a. 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/BX7O92500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33199c1319ce912404c84c7fd614b9a56e39775a7172b617a05340f8a5016bc8. 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/BX7O92500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f5361bb9614a483e397cfba425bdda78cb9216131ff7b1467190066bce8cf. 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/BX7O92500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2d4ea29294981e2682813835b8ae357d6c1811519137f2d034f1d593818f07. 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/BX7O92500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44ec77c5ed7bea79b683d712cd81e385efafe887cf618149dab37af3a8ae49e. 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/BX7O92500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33199c1319ce912404c84c7fd614b9a56e39775a7172b617a05340f8a5016bc8. 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/BX7O92500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035329d868710dc638a49c63501dcee1013454b92b4a5abfa8261cb1f6bb60eb. 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/BX7O92500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa837867c4da591b1e4e463716ca46a846d718abba81f02f76b50a03fbb9d8f6. 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/BX7O92500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98352e3b1ea87bb75d543f3107e0b82a9b9611e994132a9bc50841b4a4dae25a. 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/BX7O92500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc07ef43951b767f85245fdaca5c0442dabaca78dc00cd5a16d302e02b18741c. 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/BX7O92500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0c92971cc2f22924b392e11c3af5b60ef38d37fc3776c5db962162effd730b. 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/BX7O92500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5702c3a91b79a270d9c7e18f522304977771d427c6101f757ef5e2bd1dc7d9. 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/BX7O92500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34982b8d444bb9ffea7874a23aae1b9c1034829266285528f087a8355a374888. 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/BX7O92500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb823ea349b025c863b2ea539d828077a4a1afc8de9641ce852414680def1ef. 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/BX7O92500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6df386df0604ca1be18b4305d3e86ed41ed20d10e88213fff786edb758c992. 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/BX7O92500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe657450f44ce0f3f833fe5a002747bd3c9bc5a123fdbc16b4382a809a4f03592. 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/BX7O92500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a003fd193fbe16084913caf751db067779b5dbefe7d6860d4377e183d20e0a. 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/BX7O92500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b74dd22e9cd0c8b75dc0c0d4ae6610e0273b1beb7237d64c631ea3cecc806c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BX7O92500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e1af0e6e1d3bbfdaf8c2b9994b2522852cfdc6162554264c6c16cba23fabe2. 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/BXM142300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9fb85937a70b1833d432444bfb36c099de23e22495c3d64bfa2c0e07e2589a. 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/BXBMG2300577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3121ade5b1aab11f8b0f72a37257e3b93ed450ef0d2dc6089859f0e4457bc0. 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/BXKJM2500013.