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 0xb2553699712f0cde6df30f3e684e03c2b6292680cdd0cb601a46d6f39cfe119f. 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/0022c66c-385a-4461-9a14-1f32d0340257.json and https://artists.proofprofile.net/proofs/artist/0022c66c-385a-4461-9a14-1f32d0340257.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 0xd4c7d56220a1b707e2d879c546c61f0b0da6ceb253970060c73d0ce88c47a5cd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TWAE31802016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e970988adf0dd8e97325dd45a4f028a10d713d8d181072675fa9b1138574e8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TWAE31902191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e8e1b6593ab39d99c7dd414636c81d304adda99b08d0ef9cfeee68a6d99642. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TWAE31902192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a71052cfaeb9df8ce9c8214aad518c01550699cf819a31d4a0b4cbadf533f2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWAE31902193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b57a36acab544ca6d800574643011563d4f805a9ac6e1b617f495683c16db72. 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/TWAE31902194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa342dfd2a291701c1d868036cff376c807d0082a343b72c24053e6de40e562fc. 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/TWAE31902195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef5beeb40b677f7e369ec300b3315b380e76c1cac5ecfd566b05b14aa76623c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TWAE31902197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7e019152d4312d5d65a45b8eed3cfa2efb9df7e8db8fbd48047e61afebfe33. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWAE31902200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc595bb984a79c6ea94e24af051afe50048aee95517221fa763b6729f62da7a. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/TWAE32100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882b8d46530ecf520da80c94e96c751387c5ebcfe3ea720484bdf48dce9573d8. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TWAE32100174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4de458103bf5ece1bfdb37faa34235e2122076c77c128a583ac2f45cdb8823. 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/TWAE32100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ce7e47c6f4b101b782bafe8fbb97cc9554c5f939c1c59e586db34d2464dac3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWAE32100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661716049283c651bc46a72a0ebbbb98bc1dcba91c4050932a15ec90bae9eee9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TWAE32100177.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2472f29d800a0026bad2df2faf73da67aae321b559bb314ce283079c456c3a06. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TWC012210891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d3795d9561a4164d69f0ee3d84bb2fc4a69d6820a63db0c7af84d67909e6a6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TWJC12200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4fba70c303e1f175750465d47b97c0c45a297a64651946ca434c87d15cd370. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TWJC12300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765c437a2650187fda509a1140604e4923d8b5b5e3066dd59d41592fd77b4983. 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/TWJC12300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8902fdfe0020fdb0999e344f89d2b26f09c63c1b2db72bad65d10a4f96b5be6d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HKE022304472.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfbff29148000e9e189a7e7d0eaa442aa75aac6180a1a5a71e49977e43797db. 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/TWJC12500901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfbff29148000e9e189a7e7d0eaa442aa75aac6180a1a5a71e49977e43797db. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TWJC12500901.