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 0xe7d9cfae759ba1c6e12ebc186ebb9d0a37eb1eefdf35cc2001b8e96f1f0f77b1. 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/4f0e20c1-2628-4a8b-b34b-7f0dd1f0074b.json and https://artists.proofprofile.net/proofs/artist/4f0e20c1-2628-4a8b-b34b-7f0dd1f0074b.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 0xdb541e219c491dc34e269c208ab34a3d8f772df7ebe212299ea1512ed5414673. 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/FRX871510803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a442aa692ea0a96cb8fc41fb0660806e373d419dfed4e9f0fb7433940c9cd0. 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/CLAA21500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4290f7d2db4587b279204ab3780c0126f9c589e8c2df5da20195b5133fa0c7. 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/CLAA21600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2703bb2a7be67bd7a9b31dcf6b9adc63882f3547351fc62b8f990b439be93168. 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/FRX871537452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0acaca76593b1dcabe3ecfa60a0b462864f7ee15c6dfb3a7afce686c2d97b6f. 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/CLAA21600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab642419dec62d597b4a5a0dc253780fe5571ac80acdb14c4bcf494055d4797. 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/CLAA21500299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3704fc5b1a5f663299b991867cb91f4d8a0dd3519138458b371440bbd069ef. 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/FRX871510789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc3c1a09431e7aa765c8ea89f19853f711af0ae6135413dfcb78e8d65d7708e. 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/CLAA21600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d37c7712c6f9a7b573d7d3c89a0ea71874e5892fa6ac8b1266531b76c8512e. 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/CLAA21500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b9627b988cd17dfde19cc36aa66d5d793e6afab86f0d9575e7060982979bb7. 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/CLAA21600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef23175fb4444e4dd2f8a9c374c181ee8bec1dd93feccfc2474aadf8632d2d2. 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/CLAA21600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb656a909fb7b6a5187872a6bae17d537fe2f02aefa454567b918e6db77dd032. 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/CLAA22100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19842eb98a80b03a94e70a9c8bf260e83899cba21321cc02bfb5b4a02cc774b. 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/QZK6P1936322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fe5955901648c3e818177f7538c9f45509601658e1b47b2c4e6bd477672077. 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/CLAA21900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4983df329a68ea4c161a6dc19759535b8cfce7bc3144a2deaee7bfb1a4abae6f. 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/CLAA21900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a7808f6519dda291d459402821b99f0cbdadad5689317b5771b996148f0ace. 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/CLAA21900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee2fe105b14c0811a3b9837adce21a98765f8814e499eb358558a9ccf2c2de5. 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/CLAA21900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce0ca463b0dd602a15d876ae3d49e0e45c60d495170259a25af7651eeedf48f. 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/CLAA21800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc549f0c3e6dcf17231474119c84fb33c62368a058383fd663b1de98bf1c2e6. 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/CLAA21800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e220bdb17ee2f20b0fd3631e31765b59d6f620fb8f7653960d44bc0ed17f98. 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/CLAA21700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d95645c7f4bd04fc167647b3ebb11a4b552e2b859070438b8dda59fe182533. 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/CLAA21700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed20511de06e546c3f368664dcbbed2e08ccea60172cfe535b7c332847e85403. 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/CLAA21700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc02d821a85940551037a7c425c2bbf31930ed3ccfa30748c3ef5feab964e62. 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/CLAA21600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae14f60b504b3b01bf86af1de590e89960af0a129a59e8bbec219f848be3db2. 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/CLAA21600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc3c1a09431e7aa765c8ea89f19853f711af0ae6135413dfcb78e8d65d7708e. 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/CLAA21600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef23175fb4444e4dd2f8a9c374c181ee8bec1dd93feccfc2474aadf8632d2d2. 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/CLAA21600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27191513e5d8c4ce47cbaf8559b5244c39cdce862e29ee27f42a0e44cf85bc52. 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/CLAA21600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4290f7d2db4587b279204ab3780c0126f9c589e8c2df5da20195b5133fa0c7. 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/CLAA21600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab642419dec62d597b4a5a0dc253780fe5571ac80acdb14c4bcf494055d4797. 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/CLAA21500299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2703bb2a7be67bd7a9b31dcf6b9adc63882f3547351fc62b8f990b439be93168. 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/FRX871537452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3704fc5b1a5f663299b991867cb91f4d8a0dd3519138458b371440bbd069ef. 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/FRX871510789.