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 0xcc0f658836f0b138bffa1f01c36652f2c011606cb1c742ca0bb18388f024f806. 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/d9a1a77c-49f1-4833-acbf-c1eb312ef7ab.json and https://artists.proofprofile.net/proofs/artist/d9a1a77c-49f1-4833-acbf-c1eb312ef7ab.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 0x83107e3c0d07653d35f15a294572ef7cc4703fd845687b67a88bce96592d25dc. 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/GBBKS1500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b6ec4c05b145a98829cee40a07723b29db57f991e5cc21c6b9d6fd7e4c5a5. 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/UKQNV2100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5dce61d8073203513fe2dae1a8db0616c88e009215745a23708e08f79de033. 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/UKQNV2100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76e67a732f91abbf2e513c1f97d380b5473c005ef6f5189514c30ed50cd5a21. 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/UKQNV2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903d8b2121c84ae9b51ae334bfe52a28d787a353bd3b1123984d1312e393b148. 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/GBBKS1500175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b92d7841ea8abbb646a453b8ba6837f4e6109c68568ddd5a213a253988572db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBKS1500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b606371ee6a994bcbf9f109a6ee3c3e8589f9f3634904ad38998a3a0077ff4c. 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/GBBKS1500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb1655f2eca4240292726ffd8b9ecaa7f5194b2d6c27769b9ef4da38443c098. 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/GBBKS1500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8c2661bb13261f50bdb6626870a1cb685d0916fc7de8278c9aaa8a277b2b81. 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/GBHLW1602375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c3768e68255afd9be159bf2449dc8d7575f4fde65602927955a1eef44100e. 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/GBHLW1602376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd0f52559e3af1ca64f7044a2606b82c635a56e4e9f2c936cdbacbdb0c8c362. 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/GBHLW1602377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fb0e94ccd84450df354064b6b2700d5de2f2365c88397591f561b5f30a2cff. 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/GBHLW1602378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a9f43804d40df67f6c48f7e4ecf2dd74ae77c6f891af0535eb3ee92f14518. 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/SE5AJ2001099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467477c8def4c89cc99fc159894b612673ec1d91d4d50a4aa2e3b86dd96a56c7. 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/SE5AJ2001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4e8186d66c12c4ef32f035bbfe8816ad7b5ae073958dd84174125fbf120c40. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/SE5AJ2001105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8bac8a00c43d60c5aaf4aa7464e4df49c569e1909cdc450cd55cf3627f03e7. 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/SE5AJ2001109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68c4b44137c9a403b343ca19ac622bbf9e3701d3e1689d1fc772d07ea9d6c2. 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/SE5AJ2001110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12ae0a9cb2492d29ac499313b2be17f68a776f38e7e62f414fd4d43270c86e3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5AJ2001113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a86653f0b26afb9363f2b1f535ca7d7ea32a983ed85617ef3c8d1749b17cb9. 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/GBUM71507722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cba0b69ce06eddc7c00c85d5ca4c058e38178c38161f4c330d5623cb3c6b431. 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/GBUM71507747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faf5f5aef651899197219379550fdc4c62f4353ed0d2b30236a61d50cd581d6. 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/GBUM71507724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e9a3d8b43fd8bfcf5795c1af21ee51862c78297243ebfffadbc0faacc42264. 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/GBUM71507725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d5788e7958c3d768d31456b9ee6fbd480972f0f19d79a40111ac84a2764269. 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/GBUM71507726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982899a54b36aaca085669e2ba8c2a61b5b1151a60340da95179fbc36871cc3c. 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/GBUM71507727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa536f59833ff92c569b3ea4ed0e38d0c85b60a9ef825fe959933d1aeac5cbc63. 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/GBUM71507483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4577a4ce13e9c3c40ad53dde0c021c864cdda35305cdaa26286f8e3c2f2f9c6e. 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/GBUM71507732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7367d4d82e10e5261add254018353566646f4b0f3cdec0d04d5d485bc54a48e7. 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/GBUM71507728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f69f7fa4a5ae56042c3c288bbd76ce93be614acc4d80d51ba4778aaca3a246. 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/GBUM71507729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50f6bc4b382cf0fbd9bcefdfa4ae4dcfde63bae52893e0f75204c6ceda6ef2. 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/GBUM71507730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7eb0cdbff21bdcb5f01f57387d6633185a3a0f8a349a267ba9988a8b235d8c. 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/GBARL1501207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a9f43804d40df67f6c48f7e4ecf2dd74ae77c6f891af0535eb3ee92f14518. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5AJ2001099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467477c8def4c89cc99fc159894b612673ec1d91d4d50a4aa2e3b86dd96a56c7. 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/SE5AJ2001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8bac8a00c43d60c5aaf4aa7464e4df49c569e1909cdc450cd55cf3627f03e7. 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/SE5AJ2001109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68c4b44137c9a403b343ca19ac622bbf9e3701d3e1689d1fc772d07ea9d6c2. 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/SE5AJ2001110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301d21bab9ba307832473ad7cb25615d298092bef5c4cc8b84368f23f2a4fdfa. 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/AULI02035490.