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 0xd971847223d5b92a2fa595af37f8eee55ab8b510de89c8b064435a3595284284. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32863d0d-e483-4b29-8c48-9aba60c24ce5.json and https://artists.proofprofile.net/proofs/artist/32863d0d-e483-4b29-8c48-9aba60c24ce5.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 0xe7a2d893c686984f3eebd54adb2adaec3942618adb9077052214baf4471878ed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ762477364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a40fd554b60b3a8076b0aee250b4a950d86f4278fe865ff96f380931d76c4d7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7P2407379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59767b038b6e6c7b4dcbe3441b1392fc72a455011c4adb0c305c288f62138c7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7P2407380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b93aa360e2db90c06152fb08b6ce70bef4c51c9c67e79cfbe6c5ad1a4ab83d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7P2407383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53880cd6f973ac3efced2ac740430efff0491dd93b524e65cbf6f5950fdcb35. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7Q2423597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd130167655e5dd19777139884961bb18db13d638f9d2d76414b43caa67e611. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7Q2423599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f711b1523d8d0aa762074569a233cc756275ab148f8e3655e9dc37d0713998. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7Q2423600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f37f55f91552fe2ea74508b99dff2b375c7b5ecba609f7647f19dfb8a4b1791. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7Q2423601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee17dbd88713f4cf4b30aae3a3e6c8cd6022eaebef9074f073d3377a2dd17ebc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7Q2423604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355a8aceca388d25206df43ee9d1b25239b2311754e8b7a36489d53fbfd9701f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7W2423432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3008ba85f1c0ee61f610cb83c1d3bd6df589dc6afc6a7209c52c169bae8b49d3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7W2421138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe8a6e0ba128e195134ef731fb0a3afed05d20256a356347ec69b65b047a79d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7W2421136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ba1c1724793f7ea4affbb5ff700497ba1c71631779de501507b795498923b. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/GX8LD2550870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0b049393807d2c1b13fdd0f3045ff8dee21799274c63a5ffd1556c411bf364. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX8LD2532748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c676f68d4e481555fd7e2e8d5995fa695aab604f1c70784bd796250555fbbb1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX8LD2532586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa865204b1a0c868040b40969c4f089002cabc6f166e81076937f6dc4484486ce. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX8LD2512286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941f62f788a78cfaac257ee7e90d4d32b0c5b588b59cbe3cade2dc5db15f19cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX8LD2560725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde9e65596b5d0e91de17e0d4fbd75cc9911486017283aa50b796e6a123cb3f0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6H2544916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156fafd8d5c3cdad4938a688ccb92c750b9628a29ab529d98e5f7a4960841dce. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:06Z), 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/QZK6H2544917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5929aeb3afaab642f0d540b2e10c86c82d6bff1b383b51eda593f81aec2837. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6H2544918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789d8c33cac8defda3c2c2a9395a54b35857448497c67ffb28429e34e7ccda57. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:16Z), 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/QZK6H2544919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf70527423a329fe7a10d820dee2ee76d4cd69d3bdc9038898306289c1059b9d. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZK6H2544920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8325a10c53b6fae1db84fff5223c8dffd70362f66429ff54689e24b198009315. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:26Z), 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/QZK6H2544921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3965733779d02e1ee2afce6ec68b4a4e61f563f13279eb69d5df3b75b96d1eb4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6H2544922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092efc4ea8264affbf83909bd00cc0c8f0b4c6458757ee5b536ae49125c2d3ea. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:15Z), 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/QZK6H2544923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723d71e74c7a0f83f919183249d4c43740b250ab1f1b5b91f0d18925f1e2a043. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZK6H2544924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fff3c545b441e91b57f538838c920b3f781a53abf7c14bb646d13388fbf64a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6H2544925.