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 0x21d571d366c065c7df46bd5cd34685d59f4e827d43a6ed3f3a99272ab8079275. 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/ba631e47-4138-463e-a2b8-6685137a94f4.json and https://artists.proofprofile.net/proofs/artist/ba631e47-4138-463e-a2b8-6685137a94f4.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 0x7c8f5ef3498a38d6c77f7c91ddb9947044659f8329033904da2cb687d4182590. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FR9W11617854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea59a19ef708ef2b1bcf2a5630b1ae3e4bc6d33fbe29a63ae84e1cec487d3a7a. 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/FR9W11617853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7a52d963a0a472440273bd0110867854397396cc49a6b8509e33282d35fd27. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FR9W11617856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62775591a715b091e035f46c340677a57de53d3567edc88dd95293806879211e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FR9W11617858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c16d6a7929e05c44a1825a4c32aa7a5f1b8944c46fa7b001f4933ad222b935. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9DA1700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63d16aedb3595e97abb38bc55f9d78dee7232e613c7bbe30267b70bfab8b583. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9DA1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c16d6a7929e05c44a1825a4c32aa7a5f1b8944c46fa7b001f4933ad222b935. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9DA1700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7186eb8ce3c17e06663c7a75ecccf0324dfe706c9e3af5608a035ee73e1ea9. 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/FR9DA2000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db40b29793c2a2182213848558cff10110e8f9cd52d33b4f854d8224a39bed1. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/FR9DA2000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0106425f2912ad74ba3143efd9d1e8b22efdab18eb666950a6db1d7de531d8d7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9DA1900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4608abf26a34622a557eadf0e265ec731dec0a0eefa913d96b5cdb24cb3d161. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9DA2000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25ad6b0d9a3c77c6bb81d7a3602761189b89689075e50fa563af3a49e071f45. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FR9DA1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c2535ed35752ce604c21cc31b3bc62c2a6deb4829d24e2be41fce36fd4fbd7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9DA2000380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ad3099e996034e2ed82c87182888fff284e5066a7e64905418255d7a55b9ff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9DA1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7782d569b3fdf69ed5869a964d38a56012f76501fad6c83eb1a4fbb6f6650ea9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR9DA1900270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3148dea2c70cd0b5b968f82c4a93bb6903fd8516deaad888d26a8434bc89f8f7. 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/FR9DA1800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6529df97476d1faad21c0f02a6ba9579d315fbe94de86f369bb1543afb08d4c9. 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/FR9DA2100570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489253489af849d7757a307005692374e6b606ad624271e66643b0ea802ed7d4. 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/FR9DA1900010.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0106425f2912ad74ba3143efd9d1e8b22efdab18eb666950a6db1d7de531d8d7. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FR9DA1900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ad3099e996034e2ed82c87182888fff284e5066a7e64905418255d7a55b9ff. 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/FR9DA1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe1fcfbbe54b45889781ee8379822b688b2e1d08101bed7897ece7f55e6bc1a. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/FR9W11617855.