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 0x6e7cb0cc1bdccb267ff5be7d3d56375b8f9d205e5b355d4515cb3e2fe076a5a9. 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/060f7a96-0a67-4be2-885c-f19f5c086997.json and https://artists.proofprofile.net/proofs/artist/060f7a96-0a67-4be2-885c-f19f5c086997.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 0x5c3592a726faa205056e8a831e5fba693a39c5448ea389e759eef968cb035d21. 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/QZTAZ2364434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e682475dc5af21b4dcdd5571cfcd1fd446bc4b15bb0aff5dd4e841eb4ab9f40. 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/QZTAX2397220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7e64b5c808c6c51c4d7b1dd7760523215f6f0b39584557a254f2ea081ef3af. 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/QZTAU2374738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea69a1a8123880c2c719790d5cb57f97ecdf92c41aa92e3f2b275730d8108159. 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/QZRP52348502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a49282a444046aad93e574d7e0086698c2f5706bfb13f942986cd15dd84403f. 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/QZNWZ2368790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14faadab822c6e08d3e038bc5a0ad46f3231a71c2318fb29721011c4626a4dd5. 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/QZNWX2382525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc1a9e1284f317f8f81c8ff0e5fb69ea2b7154dd60357d418f9f665a6342645. 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/QZNWR2340934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070f91fae7aaeefb47ba532877979cf49db7067117ea4ac543b52a4aa7ecaad9. 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/QZMER2389034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ac09fdec74055bbc23c7d7f786c09c157efeeb6bcf80fea7be55267c4e59a2. 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/QZMEN2365220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65672703ee55a898d05376fb8d12e36201069da264491a5e4de4330d4e6fda8d. 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/QZK6F2376959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4357fe16c63132c98c3110a10c6aabfa127fb99204311a2f1d9b810add6ad70. 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/DEYO62400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4357fe16c63132c98c3110a10c6aabfa127fb99204311a2f1d9b810add6ad70. 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/DEYO62400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4357fe16c63132c98c3110a10c6aabfa127fb99204311a2f1d9b810add6ad70. 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/DEYO62400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070f91fae7aaeefb47ba532877979cf49db7067117ea4ac543b52a4aa7ecaad9. 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/QZMER2389034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd100dd1033960f337a73077ed6c5228377603bb1e4def3633099097a7df72f02. 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/QZES92324676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dabe6112a0f657b394fd1f9b102f18965752687606d93292ab99592168259ee. 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/QZFZ22442017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65672703ee55a898d05376fb8d12e36201069da264491a5e4de4330d4e6fda8d. 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/QZK6F2376959.