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 0xcdf1ede44863738f2d06a226ae856d5510a3e0a0a22d8aef5721d67539d27bf0. 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/4f603421-d873-491a-86ca-0c1b4fd21eab.json and https://artists.proofprofile.net/proofs/artist/4f603421-d873-491a-86ca-0c1b4fd21eab.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 0x16d8f502ca804192cea763aaa41c2f97cbc24d39941f7fdae48b0394e58b5f7b. 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/FRX762490546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320339d8433b0120c36e8abe09bcaa89e1566ac78a6406a6e7f7a8f0f067d3d5. 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/DGA0H2314601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691087b1cb86052dc3a5220db5418769e4eb2abd8db893f5b50e76a4be4df1d5. 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/DGA052317607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9462ead5f33cc3f43febc14ef342361da4b64035b01a8532c20b64ab07ad9303. 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/FRX762384772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b1db7eb41d9a7c4c5f74a64d493a327ba16c11bede1ae15b622e80e90ca461. 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/FRX282366472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e919347f1d37844ec51f28c6bd049c018715fc470b66e8feb3074464d30e3b. 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/FRX282305789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaaa7e480840c7529ecf4ff5c48e15e0f76305018321e47b4b0d7b303b6faea. 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/FR59R2314074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50b2003efdc1c49b42e4840e695b3d439f47246cec67acc128d7b2cbc0debfa. 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/FR59R2314075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f5a80875e559c60e0a20be9539a66919cc99ab0750ce4f8f3af1ccc57dbe25. 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/HKG731789536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5612913c29753e53cbfde1c58cac630240157e90067ea117f412b35438597b. 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/HKG731734076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b21271bd23613ebef661f8a5f184cf8685f335d76b3ebc3bb7ea65c3888d078. 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/HKG731894383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a546dd3e479b8af77ff3a0f2351ebf8aa59243ecb60943122b8796edd4f8d0b. 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/HKG732122804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc85b9b02331cd8b08d9069345988da7d32c0a78e681f7c51b7532a5026f6b. 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/HKG732147701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4ac07650c5b20f2473af85cb86ba2b0d68ebedae7f7a52c6330ca9cf9bded9. 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/HKG732128815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923c77836fc706ff6693d507fae1e0aca08484c65e0416b860742f498fbc9ee2. 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/HKG732152377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12380d62546338cf1e6072f312e2d80407c2cb68fc66352b23e894f328eca8b3. 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/HKG732117245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f442abff1c66728b34bd3c8764a5e97ce9aad7c09cbb561161d1ff841f1b6cf. 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/HKG732115124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140150a4b5c4c78e05eeeb477605ce9907d3c81f970af3e5c4dcc1058db88cd1. 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/HKG732131395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ca4368a9182e16dfe1b8b536e07db97f03edecb9771c36b4fa20324325561. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f7974d7d57c74e20e18de8bfc0bcaac56f14c829c73ea2712048c371db793. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732030432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11740f67b0d98737c9441e7c2c3b1cf99df4e0c9f237c602ce397ccd4c9cc028. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/HKG732030433.
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 0x59e60687feb4ad37e544a7358c326e8f8d3d2305c709bf7cc43b06d6789fa6a5. 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/DGA092412386.