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 0xa2aa59bb86ccc8fc21e532c1cb693b16b3249f259e2e6c82f580cfc015c8f986. 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/5d557bbb-c87e-43ee-8837-fa775a2024ee.json and https://artists.proofprofile.net/proofs/artist/5d557bbb-c87e-43ee-8837-fa775a2024ee.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 0xed4ac9a5d22a18bec8f4e1227324560b9b5c6657be04dd97ab3184b2dfc7ca15. 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/GB2LD1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa28dafeb724f768554d0217bc3379b52d06587b4f5ae13d77b2dd480b6e6ec. 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/GB2LD1700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cdd9cef228ab45bda69698f0584ce63de5c17a6f5539bf6c8d07c054bbc9ac. 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/GX6BS2202007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766f2b25e0fa3b434e4c784a5a9c984ab901688d81d0d6815d22d36caf87f252. 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/QZ5FN1862855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915f3e5d533b18286c8af1f0193b113c81b172c660e6d690203a5bc16018b3b2. 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/GB2LD1900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14924c0917d23de37585efc5e7439c0a5af0aaf44832b20e71f9f9dfffd894e. 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/GB2LD2320352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b071bb7cfed3952e4254c77a6da493aae424ddc07d5784354127214dddfd84. 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/CAQOI2413745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbda6787b4df9978f8d5a40601986e729f0c76fc561c85e79427977f854ef697. 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/FRR642400848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233399b033ca50fc6d6eb4408cd8a163be9c5357061af60d67af1b2bf1e1ff72. 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/GX6BS2202006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e96731bd67139d4ec64849145fccb4cb87314003af670f066219127dafd1843. 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/GX6BS2202004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6aa59544adfb03319447b761c011166b522fb524b1897acbf4d6e3da344291. 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/GX6BS2202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdc9ad7e88547ffb5d459f01cac6b99f055654804436920dd1c9b05211e4878. 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/GB2LD2110261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cd8d449674d4f5c615267855b9011e8b55d6c35558d77c4783ddb781243608. 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/GB2LD2010140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5d4db4d1d7e22f65f66788802e1fa6c53a4e2bd8cc6e50c3a8e230f67f4dad. 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/GB2LD1900222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28155abca8b9c5cafbd2c05617569a23ffe789ea425aef561a9de3af164ac7fa. 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/QM24S1834844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773599c18e07b43cee584ca61737b63751406a9281474ebd5afab0adcde89ed1. 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/GBSMU5554702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7aa44bdf77cfb815a91555546dfd0c8ff9995a615191707fcd5d94964cc6bf. 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/GB2LD1800647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df8af01616bc3793f2bec872b0ffcc62bbe1c1d76183b11775fbda539572082. 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/GB2LD1800602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a49d0588e47e35087a5bc41efc1b5d0700a8caf44a708c8f042f3493e521461. 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/GB2LD1800490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0288e850b962fe792b4abe5d57f8a01e4b6e6cdbde56554e81c0f16f8aeb344f. 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/GB2LD1800509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3582b47ddb84ae2762859cf0dd70a663126251a084f0fee1fbd3830d10a23778. 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/GBSMU4917017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4443417a0c89d47f5ee03c7eb5dbb0c2a7aef8a34988f8fb67bf0037ab90ebf. 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/GB2LD2410490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234695cf1badcd1c9766256f0fd49a21d282418bae1332869ae774a37f96372c. 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/GB2LD2410491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f6344ac08cb17dc00dc25c7b864d6306d2be26548d5327d1f78d4eaab9c73e. 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/QZ8LD1731865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cbc70e6ca791e9a5a20085e8f29ce7fc9aa0b346255c89060cb8e752a11ed5. 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/GB2LD1700195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a129046da70937477929130f6587adbbdb9ba7c5fd0ecaa25697944eec7a43. 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/NLP1X1700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aac5439349f56152e17b144f791d887a278b2f837037057cc29ef4e8a40901. 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/GBSMU3700559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5668e37447f524e8cc3ae7f6b8ff59ea23f8817c1e5df495cbce2b2c1ea726b. 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/GB2LD1700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869f31429171d311345141ab1e44f45d13d6c195ecb8438798e0ac5003a1bfd. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QM24S1809816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2765243ae6496f4e2ae4a8518403bafc9af316cb65a0282aebd95136c4041a6f. 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/QM24S1704437.