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 0x142c5fb43c3626b879bfc3ba18376a1658533532936b6a0c1497536cfdf5c485. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4d6a5d4-e48c-4323-8ad1-d42a7371e5f8.json and https://artists.proofprofile.net/proofs/artist/c4d6a5d4-e48c-4323-8ad1-d42a7371e5f8.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 0x1aba73eb1a6dfdfc989a0aa034a1051d44685bed80059de14322a772dd0ba751. 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/ITS781702321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3a5e7ee09c26ef97a566f979cc74fdb774fc8cc5e3cfb43b8fe93f08ae7a52. 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/ITS781800248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccebc6f09bdb8c3aa58f0ab447c67eb9c545d34ff6f48ba2e4c0c525de3424b9. 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/ITS781701913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4652d7babf1203d34945e432ad231ac7538abbaf6de2d8ca7c098261b7ffe1e. 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/ITS781900275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aae93b55f21fc7a9a7cb920779b83a9239cd69d70bff7a1071b039f36c0c8f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITS781702195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8138e095c253ad995d6f6619fb1bffee60b8da80cea5dfcc05ebf6e7f06a1f. 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/ITS781900797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06cd44a48b56046634518df19dc0c276b86caee9e5c994e2b0d03dfdcf329f3. 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/ITS781900314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7c466273f39fbeb40f7ef3126ace269ca859688a38e3a9efac61c988bb5746. 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/ITS781901308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8a102b45cc76936648bbb9e9a92da6688bd7bda734a5b314ce43b78528d5c9. 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/ITS781901287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dfe0c25e04f8a27ae65be34807c14a4063bdcabcb685807c78041e237eb64b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ITS781701620.
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 0x89c3e555040462eddc3f316ccce8b7e04be72f8722de9529d0e6b39e24ef6a23. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITS781800707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7d26334702ab1eaa804e5067743230b7af4018e210682d15338ab243e77f3e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITS781800659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7a3432e6636a936fc03ccf8e2d46e04611f0936510f2f422838e52a3a4bfd5. 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/ITS781700297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728def6a93bced3f6565fec3a954865d7e656afc860b75b3cf2567b4c40b7c8e. 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/ITS781700298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b83fda37430711a5a53e1d4854432796a771440a40848c2f8e390258f1bb04e. 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/ITS781605961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541fd3869594d9712b9bd611634b6fb030bc6e7b8ec06e1db58a9471ccd5eec6. 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/ITS781605908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeede834ec6115ccae92d47ee10c9af928192173b3156c9dc71e7623bd9507f8f. 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/ITS781601965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c245b9a22ed4a73958abb1f0ae9d71087ce4d7124dce34c88a63c9cc9192140. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ITS781604593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58cc74c91ffe3adc4c398c16579248d4fcbc0f3db874ce71ed79009ce53f423. 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/ITS782401530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef709d9a98123d0388b0137020def94844b38a5a8e0e88849247c1182142432e. 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/ITS782401284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1b16eb2652f65ce541b05a8c299dc7175f61fb088430727874904764bed3e6. 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/ITS782300787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f373185d151c2a56f8505d3f5a4881464757c5bc75c89419026a93bdc9437e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITS782400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42196bbd458de66413b305c2a1fb2d4f9c3b9a23c6b5025cb8674dcde9f7a6f9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ITS782400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ca48de2da3d09fbf95e64ea234684c649f17642fbfa481ab785c73919658c5. 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/ITS782200012.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffc671de2954f5c791b90fca2e76659373639a541f16b41f930d549dc7bedbd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:33:42Z), 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/ITS781601487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09160eb45329f3415d21c6065e1ebd716401560280afd62309f7eef3285e019. 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/ITS781601492.