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 0x72e4110c76ceb79e202bcf8fe2052c2237476f8ff285d0ccbd937b378698435b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad01c81f-4d62-447e-b3f3-6d211bc397e3.json and https://artists.proofprofile.net/proofs/artist/ad01c81f-4d62-447e-b3f3-6d211bc397e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x34867b47d38c0538a6ad3c4d71887bbc36d42a37cdf9a5c5f4a96ae78c7261fd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITS781901036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925f473982ceaa39a619af6862956ff2ebd72624f0c0a3e7d65011eefb02b82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITS781901172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c16c9d074215123b2f84e68bfdab21124de86be5d3f1e9aa2f0df163a9cedb. 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/ITS781901300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60d62de62a0e4fcb93fb95df6b484278763edf0b8ac0ce7224a486e49516ec3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITS782300768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51f6f49fdcdececab06809b53cb1557e4d9abde3a4aea698e1ffc6eb1fb078b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITS782400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4655e719b40f91e8470fc2f6713a60a3324b31ffbf8a55d6f0bd570407e57a3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ITS782401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9f1f9e100fb9b99a30df010e2c92665f87aff746b97d702b716b0f8c941177. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITS782401464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c8c7151785f0dd52275c2953503d0b7b1909d25d0b9eacee3e44149d060d46. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:34:41Z), 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/ITS782501016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8070a7e5138b32be3c90ecd3a19b50f03b65f546c629f856d4056d26f967349. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITS781800706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8080b156c8c13b7b0af21285d2e08e8187559f3e39b6e29ee794bca5d3b64c1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ITS781901185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e9769f491b8faad23c689c7dad87a221a75c23c0e452436ba941be69eb4050. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITS782000033.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcb651c253ab8a747e4bc2c07bec7a12f1204b380d43c50601839b9c0698268. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITS781901295.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34867b47d38c0538a6ad3c4d71887bbc36d42a37cdf9a5c5f4a96ae78c7261fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITS781901036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925f473982ceaa39a619af6862956ff2ebd72624f0c0a3e7d65011eefb02b82. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ITS781901172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb412f0702df9e408f7088a4fdca244cceb18b0e87ec5b92c8569d51cb5f21c1a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITS782000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c16c9d074215123b2f84e68bfdab21124de86be5d3f1e9aa2f0df163a9cedb. 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/ITS781901300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c16c9d074215123b2f84e68bfdab21124de86be5d3f1e9aa2f0df163a9cedb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITS781901300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f38b05af296136d50e27f17d50a70f1a337426394e6836b5ca31e74b182730. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITS782100006.
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