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 0x7e9295939e61c1887f8ce1c255320622b7270343a59c03308d08d978a23f02fd. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70d14739-f78e-4ca4-bebe-85b7acad1df3.json and https://artists.proofprofile.net/proofs/artist/70d14739-f78e-4ca4-bebe-85b7acad1df3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x86864c046513598e5f015e70a0f2ad2fa22a2d78af61af9c14c2f79ce7fd9eea. 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/QZAKB2428186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742ec98d5165ca20f9a2ca6148ca70d5bd73cf3ebe503fb644dc8c43c2faac5. 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/QZAKB2428187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2323e10a06d8db9b76819aedcad6ea9278ca71e0487e98c63816d0e9fe732de. 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/QZAKB2428188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daf1bdfb70c582a980bc7e5a9cb53814c3c5b8ec9bf8dc6ae55f9b427641860. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZAKB2428191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140cb97e70a3f2c0733bb3cd43cf72e1bd6c561807f8cde4e4304d4e0614cca1. 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/QZAKB2428195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6212b6e69527fada5d068d48e3635f590e18368f7482579c7f62a44a8942490. 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/QZAKB2428198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6563b38ed5684e77005f9e8516f035d25ec9ac2bc85412efeebb2111ccc00b2. 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/AR6B52300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c3fbf118464ebce37f2ba2c1ec9b26d11fcbc63bc0ad0fc3a99a00cad69379. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ARF062000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d545408abeaa3b8f4f5df0f069f5c243db27a15fb51bf9994e8be6b94e4d011. 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/ARA501200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe23de557839a1ee2d74ae7ccda1f8e9641485dc1627a606ac9132c3b2bb7217. 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/ARA501200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb9d137072a1239038e18f7cbbdc2db7faf9f2f6478d709fae0f5e904fc6be7. 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/ARA500900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d13817d3ac265d8565823fe817c34a63fb7896721f00fbcdd0ea9c765c5344f. 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/ARF061700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df4334d63e5d63c08405c43e1e7e6920f61d4120e058f03c303f8d622cfc74a. 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/ARF061700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68353509c99a6e143bc7b3a3515e9b3ebe447c96b5667c9761f12e346524ea28. 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/ARF061700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd991b6fd42e25675cad2bf6db18172f717f3828f91d4ebb383b8f16669c41479. 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/ARMF11700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa037882c4b3eccd7f659c15bcb4595cbb2f2b63e717808d5b538e242cede8e. 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/AR2MG2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa658f325ccb0d9b786c1449810bec9891a857ab3d314c09cb68750b35b8d0c7d. 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/AR2MG2000141.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00aa86cfa96f0709f7b876e615171e1a6d57614021a2cafc205f85b83aa4ae5. 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/AR2MG2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c0a4b07b6bd2d12c92869edfd4697a94014274e55374bcebfebd6e34a8caf9. 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/AR2MG2000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200c2536d33117f611006697715e76b5c5b95e3f0686903f7edd3e4fb8fccfe6. 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/AR2MG2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eedd815c1a8db18e06016ac9cdaa98434e4d2d643b3f9723ab0ac844b888353. 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/AR2MG2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fe025658bb4dfdd8b71a404222f5063701b428829d44903101f5eb2e58250d. 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/AR2MG2000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5be68c18ec5dde015a8b30d0c7fa8ce483120ba4ea95f56c77bac5a755a174. 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/AR2MG2000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d1b04cdb8ac2297e7f1b42aafe9fca7de7b0877a3629075d52af272b9ab045. 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/AR2MG2000134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38756116be319df193ba83a7d0e1d0ee26715e0971584cfaa994dd7a8287f703. 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/AR2MG2000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f205752d3995f1b2ee2cd09ea20d1cb20012549c6c3381f0d449a8f162b20d. 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/AR2MG2000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eac61cd47e630552ec649f0500cf0ea37d6ec3a7bd5975b28fe0d405fd48154. 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/AR2MG2000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62e0be93e75482e72c1c61dde3dfa9f6e9e5cc9d6d1b566ef9623797799c48d. 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/USA561334827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af32b1cb2346d724e57c568fb982a39c3852be3e4c4f74ed513b6bcd4aef1b0. 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/USA561334828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ac767da04a717571eb03e3aec2c411f8ac97890cc4fe09e8ae839b0c6f5ab8. 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/USA561334829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1894768536505dac7a6968ee4c9ea48b11e64348cf467753d47aeb5662ceccee. 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/USA561334830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b0346233555e8bc4b4396b01ea0a947f87e3aa0c96aa641f02a460d3193eb9. 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/USA561334831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1849ef3a517ccdada029ae34f30ad09d1d59c3b27416a9e5b3dab74865f60bd1. 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/USA561334832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8343cc22c3e3753037b11286d8d2ae6d2a7dc3c129fc5f81b91ba7ab4c7210. 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/USA561334833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd662339c36827c2be8f8a3ab276d083674c0415978cf9f8deb0f054c84a20eff. 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/USA561334834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c2cd6c02500a5fa18b2a9b098ad398725c9d2b3c54cb75df2d9096182e2928. 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/USA561334835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74940f3a74ff4ac7f23c74b5b6dc8aef5a235f820f41268da080cab5c06b0227. 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/USA561334836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18524283c48758a372e21ead0deba046dbea6e2c18886c5b16ba6075419be22d. 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/USA561334837.