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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 0x84d426f2ab8d73746733fff6b376d86dd07ff34ff5d98cb523ff44e732d5d343. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d5f5b0a-eb3f-4a75-a18a-bf0a64f5c414.json and https://artists.proofprofile.net/proofs/artist/8d5f5b0a-eb3f-4a75-a18a-bf0a64f5c414.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 0x8097939d4b0f782073b20d0a04b1e239adc7adadab9ebf01bdc2b1a41a024305. 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/CAL540101701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219410704b4fee6de064d439cb088bd474930e902f638f75e58090a0c8239e52. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAL540101702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e060954119eefc007181cc06de9467c9d1b7208dac3a232ae828701a56f58. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CAL540101703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162c9e0f94634ce7a20233ca8701dea4650603668f2a42c596b96df4fb366218. 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/CAL540101705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70274aeabec32383e92dbdd7cf2a9d8faef08edbd00739b0cb27366c3df5cf4c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CAL540101706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbd60d1e10c3392703dfae52d5c6fce895e8bd30ec1071185faf59e0fc7796a. 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/CAL540101707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5f757eba58260b95e3b8752df9a4a93540d983d7594a765e99fa8a80e59655. 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/CAL540101708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133f8977b8b2742d76766588f37c400aad5154cf5c5967e462a31fd3287436de. 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/CAL540101713.
Chérie tu fourres mieux quand t'es stone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f601827b71f9f23cc2721525f44d49265ba9780e53fa10effcefea1afab3ed8. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CAL540101714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036181020299bfedc4aa0a1c0160db3cbeee8e0079077a9cb48889c0ec71980a. 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/CAL549900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2153a377c6c6c5df84c19e31411821f5df15cd35f4acc83af405caa4a1aecc17. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CAL549900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47edffac5af26fcea0f289d5c791844e1e35bf511b33ea49600002dcd6c38e19. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CAL549900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2f348349cf88caba23378c316a85eb74b03aa2c42b40c60028fbd6febd19be. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CAL549900204.
Un char - Crisse que j'ai l'goût de m'acheter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61243ea70bf251135797d06aff1cdaae62779f5cee0d8951a853e5f97044f5e. 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/CAL549900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245fa475ff65c602afa8b43ba27c675dbdfe9a0035d33bea732c89122092cd7c. 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/CAL549900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e47bf48d4667dffb5883d61a4f0782404367c7fb2b3706289055a2e6648020d. 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/CAL549900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d949952d36dd7e758a4670da927f74bf2ba6186218c7fe4fc9147a0ccb2d20e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CAL549900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a56b599462a5400cdf221438a13e9611d1186d45112c19c45af35bf5c18a247. 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/CAL549900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0efc413955519301536e70e9c7835905eda41b0bc0ddedb0dedf0df54494b1. 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/CAL549900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4ef00fd5ab533fb0d61dd60aec19d33c3b66969bb93ef9e20c6ed1c61e469b. 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/CAL549900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51da69619c95d510c031d0a8af658b5199ef24e59bf85c2307660e34efc1e3b7. 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/CAL549900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2092784e38f7dfe473a8305e29f8aa2e223e7c783688b4c5836955343606f1f. 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/CAL549900214.