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 0xb8af8e5dcf069a1a9ed43b6fe96c4c19b914374aefb5fa06692a7495e1a5a23f. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/695608ff-37a6-416c-b9ec-fd1796a5f138.json and https://artists.proofprofile.net/proofs/artist/695608ff-37a6-416c-b9ec-fd1796a5f138.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 0xece36c45445ed3e1b3d1fbb317f0bdf31c776dc183531389a6870f371573b498. 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/QZ5FA2050412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3854f489773a5caeee69aef156ec89300f15918d385e71ec3c6705ef3655e. 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/QZ5FA2050413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c7c40569722e823f1bb256ad933c8569f438e56fee4fd50043eca7162a3c93. 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/QZ5FA2050414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d42db86afd9183cafca34ee4d005f1a05d4a5af561a42a3a06563946883271. 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/QZ5FA2050409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0e2c0a04b36c29c6e987122632ed1acecbe7adcde4786723c39b591e4fdd27. 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/QZ5FA2050418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6006fbe5dedc213ed5f36ff0e3e1bd3575d9521bbbbc3db757b48a6b97c33c7a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ5FA2050411.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d47b4f19713ca4e476360f9098f641fc65723f072caf25d35c7dfa643cf30. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ5FA2050416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d66b3e88b9915ebb80d3bc7195f7e1ffc0abf1eb355b6f969e13a008220f664. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2403980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfe23b37d50360354069804eed54a57000d0fae983d93c30608425d4a017904. 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/QM24S2501374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470cd834ece45f2f54b500224037b1486f4e051a99168c22e5da0c8a558e556f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM24S2501373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb5a081bf287e869497632bc0183286984f4e48ba54e89304c7c83265443e95. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM24S2501476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba62f70153852949011a20e0961f7d407fae21859629cc143460eca2bbe5e4b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2502011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f0dfa4b18ee9a8d8b54c7589b7a303b10a8900069f468ed93c48aac7505ed6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b923e19be83364fb3975db174f5fc8e12a1a2637aca474517e12c2625cd12a7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:17:48Z), 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/QM24S2502009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfe23b37d50360354069804eed54a57000d0fae983d93c30608425d4a017904. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2501374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb5a081bf287e869497632bc0183286984f4e48ba54e89304c7c83265443e95. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QM24S2501476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f8cf9227af77320309fe4f4421558045eb0531276240fc37b4034b3435c891. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:25:42Z), 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/QM24S2502007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9778eda93a425610f0cc14dec8b86b3ba3005ca306f8d78ef9ff67f7a10d454a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM24S2502005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0353228e35ec2122611758b57493fb14c42ba49bb6e39230b3f9b3da1199b4b6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNMX2515190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61281eb11b4c284a3bbbd4db7dca1170e15f45e4689040004bfcfbbe9eb0704. 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/USLD91730631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6931f1d7b9e5e554dbb8fe3d4b070faf4e7bdd787f8abf7c403f3f634d6171. 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/USLD91730633.