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 0x1a3033c6aeca639838e8942aa84553c108eece0f6164dd996f292e30e1d35169. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/724e5365-62a4-4e19-ad39-ee3abca7b33a.json and https://artists.proofprofile.net/proofs/artist/724e5365-62a4-4e19-ad39-ee3abca7b33a.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 0xdedfab108b9115cbc189e3a483745abeb4f0d82a50a51fc497d559c84de2820c. 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/NLCK41048698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3419a186782f1aeb5c0c95ff38455f2daa2b2029ec7cc8c70ac2b91c85889072. 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/NLCK41050656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f7bffd56170c7e65b2f57e800144939399cd5ac2f58ac754a0431a5cc299cf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLCK41050657.
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 0xd1d6f729165cdb7c549c7f2f27f0efd50b99622a0bd73f32cbef44246041817d. 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/NLCK41067968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bebef5e50887bb0ff9d044213521fa8f179c6506d2e4bb42400bce1d3a48304. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NLCK41067966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7645759572ffb47a7a768510b4feb7310d5940014f41e6c1110d45fb05db2f4c. 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/NLCK41050040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b58f2606a74e10a22e84fc29913e26cf90e626e5e907b41b7bfd2a2491bb110. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLCK41050041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc1575b99d20e834290b7bcea86a71097d1860f38634780dd9ab04e1c8e1f67. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLCK41050042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbde67ba457d404009fa0f9e0b3b585c7aba8c156cb081238ca8e5b2099e5b3a. 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/NLCK41042465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfde570e44b8ccd6d5d1350c47a50de637dd90eb44e2802d6168e14f996c6862. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:14:56Z), 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/NLCK41042466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91dd17e690d82d25e6c144d000eefe0a9d273bd433aeaf07ae9f5ec22e99b37. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:51Z), 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/NLCK41042467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e00265a8212785143d0d303d8e6f537ec8c2b23f3c5f481c792c0117bcce9dd. 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/NLCK41040133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4ffde08bbbde6a273b5ac6585f7b374833e41942e427f79509c6281b208a67. 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/NLCK41040134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69094f0ed9f74981c1d9192ef87f82a2ac2f41a07685dbc79f93211911a5d9ae. 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/NLCK41040135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6fc0b3306787f60fdaab6e538cee13a36240d5d083879cd7839bb25e8bb41. 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/NLCK41040136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a96971c28dfb4435aa637f19c93e343afbdd18819136ebcb9e95e43c00d2f. 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/DEH741653537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28ec6b551d04818e369d934375bce6c47fdb6a5f2fff9e229a4146e2530fce. 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/DEH741705148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a580dc8f3642d945818a67fa316a4696a82b7e0def8230f7e25cb75d7c29d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEH741653539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2422735074d598bc40d1bf5789fb98d863b210624db901fbfbc9a16d944bf8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLM791400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51016bee9335f07a6ac98c66b1c7579b70cc245fa861ac7bbcd1dce3f6473cdb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLM791400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e3dfd78abc11e2233e8738ff1d9bb1ff02ddfb6193b44a4740f7f0748a8331. 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/NLM791400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea787b2223ccb5cddf957c62df641a17ed7e3938b744f0659b8fe1c315fd18c. 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/NLM791400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda165735a0d48f85d8f5ba10e254939f928f11038acc2501c561cfe35f540039. 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/NL1GH2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ff3ce72e14393d7d13559bc3dec00c1b24598048dfe77b111d1fb783f9b55e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NL1GH2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfab9480ada33dc9fbf9b0fd97cb45f2125685f99d396ebe958a126edf3ef0b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NL1GH2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c55c09956c8f592a9d1fa5040fdae20a1e990dceec24cdbdcd15258eb153e9. 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/NLM791900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4fd0170e5bec21615b57005e785d2a9ee3906c01db5e9e9cd2efaa0a2272d3. 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/QMEU32201663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf80a144b259eba695be1d21c5a938827f01a2a631f203375dd4cfcf7c294fca. 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/QMEU32201672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03f2967aa4901d998bc6b74f6526c69a4f87fd252987758b7af835bdb6e27fd. 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/QMEU32201673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c83ce64ff28c08c985bb1075790c1c09439381ffdccb2d6a88c656b47f4e58. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK41036706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f4e6a83e936d0d7c4b1215f42a75fd1a3bd776f1782ceb308f25f29a0fda2e. 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/NLCK41046773.