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 0x6c503431fd8f003edca724e30044d2e9811014aec711726e0a95470fc315628e. 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/d09ea6ca-c305-4ef2-a20c-784c42895120.json and https://artists.proofprofile.net/proofs/artist/d09ea6ca-c305-4ef2-a20c-784c42895120.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 0x3c8ca51c08068853bfe1df7e7eabcf09d6019ba284000e870cee7697d61385d0. 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/QZMHK2292458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88742e8616c05c1217a75f1a9d778d29049abd153878c0518adfbb5ec45d171a. 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/QZMHL2295874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd933ef3ef2ccf727dc32ddaab8ec6332979426e1b0c567bc79f3e4faaf80c67. 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/QZS672299649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8417d48347ffcff952446eb44816582bb02055a0fea3a229a3397b4e44b73920. 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/QZMHM2221649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2817bd93de9d7e496eb373abf0a47e7bb2d9dac0f749b0f0bdc37a4b1d7ad89b. 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/QZS672201872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3ad9fd8311ba6bdba31428a4d27a34d59aa541c416b36a5f053ab4e36d7375. 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/QZS652242754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdae48b821506dfb366774115e82ca38f3645b32431ad07c02cb8bd6ff3a05e5. 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/QZMHL2298283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf503e643ee6cd8a8584bf742c6f200c046454d959e092d5214c76a0fe977f778. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZMHL2282161.
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 0xd466e134a0d84457826cba5af1bc98fff588d963c32e46a15af7780372170976. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZS672299151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46376feb2ae090f6d2da9da317e02feb91c4e567772fa43b594b8d6d93dfec00. 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/QZES62450164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e3961102baab3853874ab7a2aba9d0998fc81dc47f6ff1a2c6b30df4cd7aa2. 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/CACWV2499182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c21b405373a1d172ef543befd819042ce84763ce7d0b438b9faacc8f0a471b. 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/QZS652216464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ee1fa375724fc11f6dbca7ad2949962e2106a192c376f9cb3cdc9e2b91b36. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZMHK2213057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1948cab6991b46a0de2115b27007278e7861b20f00bca1ee9a55bfca07586ae2. 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/QZS632116103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582ab3f0dd710a385677d87bae68286b0ca0766de03362d12f68af8aaffacf7f. 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/QZS662180678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b80e77c6c7d16527db391524349c2da1c01f8503432dfefedb51181db096412. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:25Z), 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/QZMHM2259132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f81e3e35a8b0b963312516764f1e121049519d5b5f840c8741c48222bd4324. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:32Z), 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/QZS672166923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45760e4b9c9445cf44f0c803984f98573b49a6766160ac3cb33ed3ec45bcbd45. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZNWT2427183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf958bf2fc446a68382252ce0663894386fd81bdcd1a3a0e71b28c30b5ef49b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SE6I32474209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34db76afe60490329400511dc9664d54575c92ea58ede538b213375df353c7d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM42K2365642.