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 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 0xcc97bd152e251278af41651fc8fae1ddac99d54109ceed127424764a446b8082. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f4abb5e-37c6-4a37-9a32-8f8888d7f342.json and https://artists.proofprofile.net/proofs/artist/4f4abb5e-37c6-4a37-9a32-8f8888d7f342.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 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 0xc2dee9578b365f9a2890496d30f75cf8abee8d5f0ad81ae11faeed33c4adecae. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P1392359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cf3cb32b1adbf1c8b63cd88fb5cb57879c4584fb9f73537e759a42896dcd1a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1392355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83be843dfc9d4f695f2b0f2123ab7c7fb5584e714fd4c156145189143163bfa0. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USA2P1392356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251cfa9cdfa9ac29c1f3aee878fcf1064063eb6e529eb6a085a726ceb25afbfe. 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/USA2P1392358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe7c14b95350434142f120e6007dc887fb1aa5738503d08d35089a06c92950f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USA2P1392360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3abf9b3c008cf28665f2d122395e010018505398e9066d62771eed7d77d526f. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/USA2P1326755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6585ad4b34ffed084ed45f11ddcd85ce5426e056ea161a5bd03bd8964b329d03. 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/USA2P1326756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f388ae4e030260f7afac599bb2bb4a6381443e2dceff36d6dad6d266c6e8c62. 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/USA2P1326757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722fd9602fdc9e6a4575469b0ba6304e091d1335de0243df12a97f43e803526. 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/USA2P1326758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c5ada8439b6945025954fdd04ef111fd1581f625bffc55bfffc2fc61d41fe9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1326759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cf3cb32b1adbf1c8b63cd88fb5cb57879c4584fb9f73537e759a42896dcd1a. 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/USA2P1392355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b452ef59fce01e9a6bf42f82bec32aa0f25fb13874535bf00834455cab73f9. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USA2P1326761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f67f1d827cc5b5e08faa6450a18d046834329515cf070449a26604c69658bfc. 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/USA2P1326762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa226a9e75bcd27a1464d920cf8d064ef2bbe7d68b410174a387e64672c6ddf52. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/USA2P1326763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f771c4aaea0673cc1a44b25820c95a54249f232148a02996ff5375cbd6aed3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USA2P1326764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc2b6b9fb16678d42f6c370ac0210934913e1efab061a0c6c7fb3742a8b4db2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USA2P1326765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dd564cc3aac848d4d993644f087212ae0917ccc2476d40e8e4b7750e88c91e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USA2P1326766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412da4aa998d6618e25d86e535941cb7e24fa7db687c5c741d0839bc229f01a4. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USA2P1326768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad990445c9ba6b9d722307d9c6c4365d5e18cd42fdc75062e4577df108c0bec1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USA2P1326771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480c46e715cff00e388a73b5ba47e7ac7d15714a845a66557840f0e901786737. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/USA2P1326773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7278ab4eec2b518fc0199e8c66a2194615df05fbe1af127299998e829c2423. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/USA2P1326777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfd502453c0e484337c522d52f8f2b9841fd9e583d180d26bd17d3e1f5b0c72. 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/USA2P1326778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cb0a64c480c1bc103cf793a6b3649f3139deec71b917f7c212986473ab5061. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/USA2P1326780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f4821af2652238f7b8a8f5bd89b52b86cf30b09c5c33fe86941bb9db72509. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P1326782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9634a63a7f1410200d165b38409248ece6b53988bcd943af02b24187f540ee52. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USA2P1326784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91117a0711c051bcf7145a860f30819a732fa1d1cc0f78748deb902f61e99984. 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/USA2P1326787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbe26885bea2f9003cf2c79c94d2b740323fb2654fa99f96f71dea3b5c43952. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USA2P1326788.