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 0x6e2703e75ae87017c0fe5a32938badb78f84b7445f30a7c015318affa2f94330. 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/405be131-7709-42d8-bbab-e22614ec56dd.json and https://artists.proofprofile.net/proofs/artist/405be131-7709-42d8-bbab-e22614ec56dd.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 0xa11acd52880924cd919f6dff7a5e0fc7b04006c32c6596287fe7c62be39fbc59. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SE6A92066306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef9d3de34b502c16cbb7e9544acd37e2bd85cc7ff53466db0c6dd7923092b15. 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/SE6A92066307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea173d4ec8b8d6b3868101e4a8f977bb957847736d7aa3b1c84b13548609740c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/SE6A92066308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc9e75a60a08cd7dc0b4529d18c09c4a9a4954dbb68e3a35d64b060d0884b02. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6A92066310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9617a4633b6cbcb37b6bcbab1fe5cb6a7282b11740d3c42473e16a74ec14b184. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE6A92066313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa79af4253d1901fd2a452525940701afda006418898dc361ed94d8a02cdae2. 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/SE5752090454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d0edb1b4d7eadb5997257f2b91ecd269e7852c13171137fc1b7792dd9d88ec. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6HN2080361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c36446361827c00020fdc1f34f8ff01b3c61b83ec979c09361b5efd7bfcbeb0. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/SE6HN2080362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7690d8d4e230a5ac5c598d0381d5ac55f41754bd97d95bf9ebd2705f95ce0a7d. 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/SE6HN2080363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791777f18f4f2575c5ca71385a3628601257527d41d91327bfa5609645c54d4d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6HN2080366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34fb2aee6e191371a994dc557030f0e2d7851406f319d5e3dbdfb744a47eec6. 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/SE6HN2080367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0863544e013a78774728310cf3d24072a95e5a58b6e95100fa4a7e093a2a02. 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/SE6HN2080368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ab99b956030334f533aa281666eea9b33969dfb05855b681d9a3c8b1f67de2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6TI2072041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8eacf94f84adf894a60d82f83c5eae83ac7affb0b98ac366d74ed3723c0bee. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE6XW2261516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5e41ae3369817d8ac4649c92880ac530770a6260b37c969e761e82c32232b9. 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/SE6XW2264474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b578b4a62bc886dbefeba3539d25faeb6c357c5fecd2e507b8e160cbafb226e. 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/SE6XW2264475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5602256c635ba211fec097defebebfff5404e5eec62541bbfbc7b5f7b715b393. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6XW2362821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd635dc18187e99221ef2a77a23470035fa2c6540a507ae66e15f5e8b0d6c1163. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE6HN2440009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc255f6592db503cce0d20c00a21908976d9078a23789382667d3654772e71c6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AR5UH2502689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1cea8b0570b754bc4c416f9a816eee52a9583131d2f8d7a552c2bc2103fa04. 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/AR5UH2400676.