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 0x87c941f4df7554fb5d50bc77655cc24b2c5d624148ef2c55afbe54222e9c5c0d. 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/97e06609-5aa8-44db-8552-2cd8bf6b01c2.json and https://artists.proofprofile.net/proofs/artist/97e06609-5aa8-44db-8552-2cd8bf6b01c2.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 0x08b88f1cc5ed6143a8c908f9401b15256948c66ab24cb20a7fcc9df1d17305c0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BRSXV1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bcf6e9d750dc666f745de5245c2bf23c840df879b85522dab3766787dcd10f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/BRSXV1400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1927bb67b74510ee1608681b06ba8a59df1f105b95ae3b46f0377fc3116909c. 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/BRSXV1400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e2dc2a1823f59cefc71d5e03dd3a4d5d38bc1024b6fdae44fb66fa133ac27e. 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/BRSXV1400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c8beb5600de16a9a3656e20938ef00b953de1372ed2b9b878d2f65773faf0c. 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/BRSXV1400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094975ef943020c14602c5913c8ccba12d8735638e9a7fe38574ddfe22023c9c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BRSXV1400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a5af5f758896e217f7cf436a6ea9abb176734a54b800e2ef49b34b500cf4b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/BRSXV1400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2943af96e668325e1e394c70d05dd9487e21fabf7c56e318b32423293a1f05. 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/BRSXV1400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d1ddffc3e3cccebb5d3d005c45828f9ce0f2015951c50f4bdad99abf88a1ef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRSXV1400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82fe9b9264bb5e373b6733ee19f69463f3e967650beef464253093909e70a5d. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/BRSXV1400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446f8e35c090831759ab374a4eda3e1d4c0dc84d8e0dec18bb1d12dde4897406. 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/BRSXV1400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810f80dd069777d0fcb305869c75d7f5ceb1ab21ccbf8c6c5e7a60ae3b4ea6fa. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/BRSXV1400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4068e856f99df6b343646009e6afb29626274f2f1928bc20cf8d4647c4cdc75. 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/BRSXV1400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632a0bc291dba093f46e3c644bab1c3cd8d46e4f086d8ba0af87693d1d9ef613. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/BRSXV1400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880052e9d48e61c8ddb07c4625d9067dfadd90b801c82b82956554f7945efc89. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BRSXV1400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723fa0a90cdeaa9066c29b26b276c621a8aaf8ec0839fc1bceb026cbcff3721f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BRTRB1989888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d3cf4acbaa63e46489fccc2cfc26e4deeeda029b0dced42113d663206d5b4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BRSXV1400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf49421a4d3c5e9f9465d7c2dbd5004967cb187dc8570344ae19430c9bb3123. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRSXV1400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b00bdbc5fbbe50e8e30b9c3e05becdeab76318b9ebf8d90c8143dcd22d5f43. 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/BRSXV1400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d28d365877cdb32cf492096542803c81836c434f684e8ff03d632c3c86f226. 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/BRSXV1400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582f0681e279c76d7ad7e2e634eb9f6c18dac57c7ab48ee4413534aa1152979b. 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/BRSXV1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b327630732808759659fd270c135f6c70a5a585e195d32f86620d899f9ba7bb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BRSXV1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f60ea317170c021f0aeafc2d552963001eb0a517401bf5635c3fb60f88ad5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BRSXV1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097e922c140987be17c77a36661d9ad4868474d97ae5477486f2f6f6e8577f49. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/BRSXV1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe539004cdff82f4214b0faa1cc7ca99c85d97a2b6bf3f746d2891c83ebfa9a70. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BRSXV1800007.