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 0xd8dc8790b5edefd131eb33a0fd98ec5daac60278b3780f841864885d5703275e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af282d39-52f1-4ce5-ae31-782e86f9089c.json and https://artists.proofprofile.net/proofs/artist/af282d39-52f1-4ce5-ae31-782e86f9089c.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 0x05b976b4828c7dc6ccacd7d60947bb8406fa455d089e40aaf56a4cd59cc6145e. 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/QZ5AB2149660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd99211393db3106167744fd51668421e37db3236371dc7908afdcbeab6791b. 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/ZZOPM2223809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a44d77026c04435e1e33a09029a044767e701d240e13c37353859a1f296759a. 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/ESA092312386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be4919e21ebee86498e320e45ffaaf1c99ef453aa99450638441565f3fd29ff. 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/ESA092314880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be4919e21ebee86498e320e45ffaaf1c99ef453aa99450638441565f3fd29ff. 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/ESA092314880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a44d77026c04435e1e33a09029a044767e701d240e13c37353859a1f296759a. 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/ESA092312386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef464c44c6ce0095c3b34991a1f45354ab993c005aedb2e39a72a0ac8654f81b. 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/ZZOPM2231368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eddea5b6247c3243920697cb51020cd4305d8145dae5e53f85e87e86cc479b. 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/UKU932246078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f511f7dd5ae527aa3172e417c35bb0ca9be03be091f9a30d52dce17db4f3c3. 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/ZZOPM2109478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f511f7dd5ae527aa3172e417c35bb0ca9be03be091f9a30d52dce17db4f3c3. 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/ZZOPM2109478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aec18eb0356f2f18cd792540ec7d8d320cf3ff0eb7ba7b916056fda1970273. 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/GBRKQ2100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1975bfbae5844832b0ff85864b08c35eaf0bc829a710a1311e43c4107eafce. 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/ES71G2058301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8499fd8fe6b937ea32df15641eae674288cc6f53c1113e20f5e70c42ebfb9dcb. 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/QZNWW2051515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2c083c2aaa8d78f93801df71b433e8ccf26fd6d0e9d4a91fdac9031a87f78c. 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/GBSMU8493496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dc66fc577b2b907af807263e04c22fe4f9ce73c196ed8cbb6e09a92a12ec63. 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/GBSMU7838615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ab3b04c36bdcc6d60c19afff46ba50ecd15a00e3953e6ead4edf571c559d55. 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/ESA012024917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccffefb026d4c952bb6fac1d163c811dec22e91cfe84a4eee71158f24b23f2f. 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/ESA011977257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82bc2e20fdda19706bf239d3bc9d8b85406a0e92c7ef86b11a50401f30fd0f2. 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/GBSMU8762895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b956afa300ab456b9086bf6f3af0406820db26b59bd85e7cf4a829101b2246. 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/QMDA72168839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95fc6c24df6dce220d053bdf30348ddd31d698915ea460a2b5077e13ae9f130. 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/ES7002364501.