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 0xc055c6b9722af6b5e75eedaf128090356d380f71ceb07b9111516a1a02b4117f. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e64f0a0-36be-4047-b35c-7b821fb7d64d.json and https://artists.proofprofile.net/proofs/artist/2e64f0a0-36be-4047-b35c-7b821fb7d64d.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 0x7771a3db7a3449a8eada899aa1f57880ccd85919234ad64b6438e82b2cc260de. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/INM250811732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf34c8de321b9e1e0ddfdcf619253cfe219917989adde6907f43f446e670cad. 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/INM250811734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89eb6d311bbaa0a2149db18fac7f7532b8c15e18f3525a59439ab6fbda2f967d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/INM250811735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9f3cdbbc25cf4d76a5bef961c7eed99e8bdeb7a15dc78622bc06eb5df5300f. 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/INM250811739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c8ba876f774294ca408d86337179ab8a9ee0bf753bda50c44af03c4ada23f3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INM250811763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0def46347b326fc916e3ff0fe5f992960c69d1efd67c7b4821ca20f37c916f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/INM250811776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a1cf8e286ce4cf998074ccfc22f627e9ebbe0576b8784d3cc620a42bcbf92f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/INM251207734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0452a98c98b480423ae956f7bc650f153cab479f421c5bdf6150547611a21972. 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/INM251207735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aca8e6b2bf88cc5ee1fef94828bd92913a647a8138a5374b61e54ad18c9e01. 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/INM251207747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b42ed585144c8b88131cb53ebdc648b08eb4f847d1f8d4fae41b068ef9b419. 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/INM251207751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00428b6bb45dd3a530b76f9a4232fa7f8b3bbec50d0205aeb8c102f6c5868a62. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/INM251207756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e261693b6cab4b67bcd88324b387df3c1697f2b38782d09178d81fbaa4eb40. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/INM251207770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f64999b8357719a0c76fb9602d89cb7f85971c72ac72ca60881d34dcced89a. 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/INM251207774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e5924360f1cd5165f8613317b832e2ea88292524a12567d5a377eaeebf0774. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/INM251207777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e1cdf685a2d2a0b0521cf9a30ba668d88790f9c94859f401de030a888ea073. 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/INM251627405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f35bf87e819a73eab4d2ee6de684e831f755b724d7addc6813f8901ac360d3. 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/INM250802124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bc39968b1f1f54b80bb33991e419215e62fbb44f8d1da1a59ea7f783f75cc9. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/INM250802127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415c981285c9cf29a4dd8fc36b982fa399fc11d1fad8d599c5437649ba770e78. 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/INM250802130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bceb4189b295d021c2be22a0de344b78215b6dbf605f5b3fefd29aeff191cb. 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/INM250802166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ce744ec8d508ee9763041dde477ee5b3649309a12cb9022bdb65e9fcf12022. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/INS310710025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e7e25a372d753902c82c4b4aeb9a2a868acc37e0166685c7fdc34d6685538. 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/INS310710030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0cd930f2b8b4a7f695ccd8cb5e735fbeb075e175c94b1c303cce45e16c5739. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/INS310710031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7cc8468b6af5edc4d965cc0827ead84e9c905b87a1776ef173f806f96327bc. 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/INM250805184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f202af294b5f2c75a3a934a2897e1145832a4fbce5acf51633be416ef29ba5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/INVG11200950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680d32cf8af6cd159ae8d58f58a4225810ea01b7d7757b61121f5bf2f297a33. 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/INM251203768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84d46be3a4f2949d7eec23af89631356e8a1e3c637a9977b4a59a40a25d8c76. 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/INM251203769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445586bb48c705367892bfc9028cb254855150211dcae945e605452e008571ca. 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/INM251203774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7572020abf215d58834bcba4d44d2b04c1b5b5e5ef4de8e650d94978c79c5abd. 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/INM251203775.
Lbw (Original Motion Picture Soundtrack)