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 0x3b485b7233eff2c0de439e85c94286a936d0f4c15ef9d5427c2a425f4c5f1596. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ff18ad5-3c42-4a1d-9be4-8e7de3a693ae.json and https://artists.proofprofile.net/proofs/artist/7ff18ad5-3c42-4a1d-9be4-8e7de3a693ae.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 0xb5a3aa330c832ef01d558bc5dcda7fc65f8684da563beb4275713c8513ae8314. 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/GBWUL2457241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bde68d2c8326d5545c85804832bf3bc2777348dce9bed46681c3ccad6280710. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBWUL2457243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11901c5da737f202e0c76b5c6a1cf630c72bc4ffb999e0c534e0d044cb662fb9. 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/GBWUL2457245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c4838c5f7bfa4dfd17895649b45094a663d2d0da61d4c5ccd4fe7c4548953d. 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/GBWUL2457247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a97a54460304885e17c7baaed03c57448d9cca3012e650fc679db260b22bbd. 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/GBWUL2457251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3209750940b158689c6b749088eca8d2ce173a8509b7f765223e2906e286051f. 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/GBWUL2457252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22822631df45691d9d315bb5dbba90bffd1cb86ea4daa06bb5295372e4b8f391. 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/GBWUL2457253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf449bc57b7b0a72cce9797f5c0f670229b93188bf34e26d5efd33dfdcefd97. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBWUL2457254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0051523ce6ca473992050db2692022df7a642764a362c3172f6dc7e6924f4d. 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/GBWUL2457256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600dc67655f381e1b755e29704a119153769a0690a3e057d5f5d747ba7c7fe5. 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/GBWUL2457257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234afcb64df369aa7faf83291f97c7ee18077cdb5df562e2fe108469fb8341a0. 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/GBWUL2457258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b78be0b2e927243b6388d20673f6ac3ab8e9218f4bb37c03fdeae75f49d1e6. 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/GBWUL2457259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc975b154762c5dae81b704ca0b904160e5ff0693cd5c8a7c1c32297deafcb10e. 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/GBWUL2457263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7781758ece41b6fcda59572443e8e8a4d925dcf5ea3b667e10386fc8a5965cc3. 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/GBWUL2457264.