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 0x512b7cc6174e4e9cfed05949339f1ae3762858a6cb68b7b4135cd1bc8da2572d. 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/f72c75cc-ff91-4f0b-bf3f-f69255c3b682.json and https://artists.proofprofile.net/proofs/artist/f72c75cc-ff91-4f0b-bf3f-f69255c3b682.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 0xe3e4a2ff0062f60f73053b5b4700922b3ee7bcac9058523fbba4da1d075907e5. 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/FRX282152573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac22be97851d06681edd843102fd934a33b9bd17c4bb3b5c1a251379a6144b83. 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/FRX282152574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ad9d4b6197bb0134567b32414909bacf073c898adb84bcdbd05c3544d5d9f5. 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/FRX282152577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85807f047be6ce5a3300936dbcf1aa162464a6dc7eef606b6e519135d7d3c7b5. 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/CNC101500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbeb093605608023672f5d96fcbc173addc5096f46fedc8a4d2c0bd91d55760. 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/FRX282152581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abab344c1339d8db8b19fea25b3e4152c67b85e112a149dcde92d6d63ebd5f0. 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/FRX282152576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24418c5ce96fa005b27417a84b6a4c4f1cf91305334f3a8ed11f69f7ba110934. 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/FRX282152580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5e9b93387b9f98fd990adb0e6595884b542211e7e0562fd2975f20453aa949. 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/FRX282152575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46dda7d8b93739041223570d7ab1610fcfe5beaf27f7737941af4d139fa238c. 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/CNC101500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499811e1d7b6f67c062d46c7e6add43508abfe71693d2a92b16b86e2f49bf973. 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/CNC101500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e45cfd233b87dd8d4c61eb30f7848cebd2b7b4730bd8ea48c8b88170cd47f89. 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/CNC101500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a79cae79b751944172176e70edf356ea39bd8bfb4270aff8f5baa3086290ad. 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/CNC101500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e2885f7ce969421d89988362180209da9b9e6f9395ecacc91c1688f417857. 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/FRX282152578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd309d0c2b5f9baa46e3e843795948363818c125d7f3c5bc1b80a7fbf3e12bf. 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/CNC101500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f70fa4e4ba3c2d3c518d6e40e4c0b011015ba89aa966ead2ef388c39b37f9f. 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/CNC101500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad09a9e77411287fb1b0a51e8ce5fc484094d98a8018b5f6e7f7d1120c095f61. 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/FRX282152579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049963a5f3c119b77ea660cc2a336cbe9258dd765ce45ca1acefdae22342deeb. 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/FRX282152582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185dd7023d92be867983eb534977c6baaad0d5d8fab3db8beb1da77de8f7fd80. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:10:34Z), 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/CNF291400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f700b3c80ec6d9ed448c64523ad7fad3215a672a1b9a266e26e9e78681148b8. 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/CNF291400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab50396bc79fb298fa6f6097ae55c5d52f67360d42432dfcbef256abfb7e78. 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/CNC101500029.