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 0x6315711b6624d3c2cb0ed337e2b5424df7c06831112823677c3b1e36d9df9c08. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3070268-0466-402b-959a-0a7a2073af84.json and https://artists.proofprofile.net/proofs/artist/d3070268-0466-402b-959a-0a7a2073af84.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 0xef4b50fecb941ff0a2f19783342ce646a1eb9927d561b61b21b59f70c2d1838f. 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/QM6P42375697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239626ee3022c83009593dde4cd7a573b83f9fc5e447fb3379f01794a930117d. 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/QM4TX2392470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a4d838361be97cb3e090b4db4ee956335f92b27ea763e8fdd9ad519bba2e7a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42386891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f8107cbea98c15bba9467210010f380cce8e01ecd8e4475ce590e5c11b597. 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/QM6P42375735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078a7554a636346f6010c633ec06e43690d2e83a5a25326d120b8b3a56c9b48a. 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/QZNWT2160112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e83186b87bd86498df8d2f7b38ad5ea029834ce2a84a452a8f44a6523dd43b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNWT2160113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edb17e58ba25b3a111cd4da70d27717f971e964b53789089212b3c39182e70a. 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/QZNWT2160114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609f190dd7730c47ee383aa346f110ccfe0f3fe704ccbf55a294a6407be08df0. 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/QZNWT2160116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552b94e066ebeb5eda24b781656bba49b011cbd2acf2eb92217ea111765f294e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWT2160117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9724a854408cf93c7637004c2f59277ef548509d5f1702b75388295260fcd6. 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/QZNWR2003639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e7ebc42cc52b3cb7fa7d88ab5b82f03543f606d9e27f7f91d5135f62c3dd2e. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/QZNWR2003641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f77d58ee501fe6fe87d97947870d91fbdb87e435c0781386e102cef10b3a4f. 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/QZNWR2003642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4fde91ca808522f137beb1e1e8c2a7a71bbd04f9ae359a8c46880f21e374f3. 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/QZNWR2003646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ed7d1f8534a13d3f1f506c511d4ed9ea370ffcef1e5d2b5825b141a93ecb74. 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/QZNWQ2079183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ea9262b2e06820fc8549924d71d9713f81e1bb0b8207d5fcf54e66a51114bd. 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/QZNWQ2079184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0cfeba3e6c115a482ea6e96599a7d51f5f3edab0579641fc21ea3ea8cf8ab0. 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/FREJT2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a4d838361be97cb3e090b4db4ee956335f92b27ea763e8fdd9ad519bba2e7a. 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/QM6P42386891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7a67c77ba5e31884a48c8cd883c68814a0d9ae7cddb0b259247f07f2083f8e. 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/QZDA72215917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa189b999b0f65389bc31ffc499e843456327f43136455e8da44ffbc04cee68d8. 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/QZNWY2150379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b8c9d72327aa59a9071c499fd25885f14d31c509b5a92260daea69f8f87a8a. 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/QZES92169118.