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 0x2b4f3428ecd84cd312cfd5aa815d33e00aa477d2a214d0df46f260875e1cc3a7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58bb42e3-b01f-48f8-89c8-f803c8df8f5e.json and https://artists.proofprofile.net/proofs/artist/58bb42e3-b01f-48f8-89c8-f803c8df8f5e.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 0x68616766a106d2b32f4cfec0ccfabb88f0869b57d9cfc6701a85212300775e52. 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/FRS182129810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b14e3b7e08261d12874acf8ec84e24172080c014602c1ec53e28382e76e629a. 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/FRS182129811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4471842f67e8923563a0f05698e119a3503409ef9f3c122c5f2c2fee6433b383. 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/FRS182129822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1831da67afbf88198388262739ce11c4725a6259a8cfc432ee628205422c48b2. 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/FRS182129812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80dd39a0de912d136039aa80086d0d39da242e3bb8284bc43e085aeff899711. 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/FRS182129823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a5cd4046aae39ae1fb0f64779bb96b1a60faa52f4fced31fba8d26a4687f17. 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/FRS182129816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd539f20992961c31295d9bbe86d20a3ce9ed2447080ba56f7606eecb21a9d5ea. 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/FRS182129826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8435bbd46ed111885872000729ab98b7dc288e4abb38ef2e16b25df9ccfd1378. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRS182129819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464990b0b0f4d0ed821732894cc771d6cd163639695423f95eedf6ccb895bcc8. 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/FRS182129828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dadbe95f0075a12cd1da15cd3c256291f9b55cd8157c90ebdd4229cc2d799f. 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/USDY42231032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a1f5b3a043a6d06409b43bde25baa4d249db63dcdd4d5713465397688d79e. 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/USDY42231041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7067d2d354d6ea404e47e2cd42f43792c013b14f2c3290abfcf58eb7685ddc2d. 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/USDY42231045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb360ac3a421f00ab87d1c52762bb177ff23cd43f719498a4b70d3109a2a99a05. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDY42231031.
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 0x1bb52497ba692aed5f6786b48ca9bb98ca0b5d24bb564f0d08f030c29edc6b1d. 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/QZMHL2342173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec453c96b55f3da65d78af8018fc1bdc7e6ebdc3dc3eada67b4c2ed768f09c9d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZKDK2297353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b9cb3434ef8c3c73bd724e67da6828d25129eec576d5a9e4dfe504348745d9. 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/QZMHN2219264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fdcde3fcb3e358086142a9c414f8a5e7698cd9646bc706e0674d7d81552b69. 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/QZS662212555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670dae5b03a2c03ed2b09cdae02bc38bbaa81048b185264c141ed2d0408b0b00. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USDY42380632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef4dd5397030b95f65e00f3073c249615d497d819391f837baf421fda1e820. 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/USDY42380635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e322e3578a5f55841e87fe91fce23f9e844714becea203fdb7257a948902cf. 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/USDY42380639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e322e3578a5f55841e87fe91fce23f9e844714becea203fdb7257a948902cf. 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/USDY42380639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbed462a42379233a71e638502ce1b60aacdb4f8e4cce7b368d7fc98e90f9510. 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/USDY42380644.