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 0xfb2ad9b291fbffc2b0a6689bfcd6d238eee181109a8b39099ab373561b95f307. 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/41e0434f-a5d4-43ee-9f72-b3a3ab089481.json and https://artists.proofprofile.net/proofs/artist/41e0434f-a5d4-43ee-9f72-b3a3ab089481.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 0x3d5696b3d48a4c817f02b13aa5f86f21ac3518950fb6fee7d0d71792a0d6ac04. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BRMCA6100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a9b8f42c8107b6441aac390d95d9d530efbedbbe5fb1d84d42863b0fb39dd7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BREMI6600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc5ff0d362203d1bb1c4cece0c9a9e31d5e15970276e863695a023549549c5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BREMI0400843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783194641a1fdc60cd6a747d0783be5f88672ae724dedb428cc66f374c9a509c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BREMI6800244.
A Felicidade / Tristeza De Nós Dois / Nunca Mais / Chega De Saudade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e070213ee96e70da4f2a971e745b157ddee6178bc0f1e8f9ca4008821fcfa5. 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/BREMI7000263.
Foi Um Rio Que Passou Em Minha Vida / Palmas No Portão / Pergunte Ao João / Tristeza / Vou Andar Por Aí / Vai, Que Depois Eu Vou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f838812772b3b681932451835ef9a33d5a6e959a19c63da83ecc7dda0d52202. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/BREMI7000264.
Se Você Se Importasse / O Que É Amar / Ouça / Nem Eu / Palhaçada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b58ba344962c49100d98e399a1a26728352f0a8086292afa77c2c9ece5a5b9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BREMI7000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c4528304ac9592ab6353c8c191232cc7e47b4642e14169d362c3a9e54cce5. 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/BREMI7000266.
Demais / Foi A Noite / Esquecendo Você / Ilusão À Toa / Fotografia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc705ff001871b08501cace70f48f3b4d259b999cd610692099a4a5741a82c6a0. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BREMI7000267.
Lobo Bobo / Rapaz De Bem / Idéias Erradas / Confissão / Madeira De Lei / Deixa Isso Pra Lá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7f24bfb50ea15c9017b28461794dc847dbdce261fd7bb648c42d8456757dcd. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BREMI7000268.
Preciso Aprender A Ser Só / Duas Contas / Este Seu Olhar /O Que Eu Gosto De Você / Você
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9274bb09b74207328ea30c48493d7bbdbc1365a58bf000a3eb8a291a21b0c180. 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/BREMI7000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0dd2f2b37a0412ea984a30f37a7c175b1b0c6fbcf34e5fb83434fde4c00bd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BREMI7000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5740b4a8f4f5814415879d511ee2e6c6706d186c2336af066a569eec05fba31e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BREMI7000255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be7af50694a9eaeee3067aaeb5bac5906bc93cb0fd68e03763dd7e3e588e243. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BREMI7000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0892cdbe05c4619a18c79bd5511fc029614a001cf6b0a91d0d41031fcf8323d0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BREMI7000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fc4bbff2af56dde3d668a7f867da61ef09b57380a618598bfb918d5903d5a0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/BREMI7000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb63bbe8f976c73a724f891def21e1a874fa1fc816256b3baa7a84fb05b94a6a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BREMI9400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70cc762cc4f8d004c794ee1b00273daf451850155c86415e009f8ea2df2198a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/BREMI0300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5161a7df4248a1882b4894a5566fae99b88a56a6d05e9fdcb100970957472a2e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BREMI7100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2385d8d1d2a6f95b7ef4674e21ab303ef658a066334a5b049f794e3729544b. 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/BRUM71704340.
Marina / Com Mais De 30 / Mulher De Trinta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c368dfc98e3ad0974d637618b92227870e5e64be6c9a17631fab308d5948c70. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRUM71704345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa919ed5feb881cb074ed4399a6d44c86fca9c95eb8a76f1a1933f709120481. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/BREMI7200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa233d6eaeb2a4539693f8a0f2443a863b583f7d2076ef9f3bb0745bb23dc35c9. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BREMI7700534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153f3e240ee4ca864e2b3f916018a6df40cb279577cd3907a5aa54910288bb54. 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/BREMI7800598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15963a3c3c3b77210473933007b3ed597937f24fcb26ca9e5c37a468fee272d8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BREMI7800599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220880591c6b8a633026cd6a27e1d0e017b34d370d0ddcdfdcbaf967c0664142. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BREMI7100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1609fe1cc06adbdc07da431d699693dcbd3edf2e843614abf0ad7226ebd16be3. 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/BREMI7800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2d0648f6c7ba455cbd81ecb49098e062cec9d645cdfd8acd17089a9c76b0c3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BREMI7800602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcffac7cd7dc2ab64ad9406d6afdba0feb6cef5d3567d55019797122044d28b0. 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/BREMI7800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c94a00bc1c2a81105e1060c1fc6dfef8ace8e5a3ec0e5bd52c7975e767a4937. 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/BREMI7800604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae990305940f24cf5651bbaf605db32f6638b449377bfd5fa6e918727475d051. 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/BREMI7800605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995b02056c2a258d1776dd90a34c4791bc855446869d0d06c42973e710b5a436. 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/BREMI7800524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d407d51aaaefe5523970d3f4d91eeac6f8970a68e618dee71d42f2580a649d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BREMI7800606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06821a8b8555c30ab8bef4bd0fed848dac4ce99829c10424a4c3f8f87dad5d95. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BREMI7800256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c60720d2ab5d990402fa4e6f30525c2378f71f81ac76e1accf2e5de4c56294. 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/BREMI7800253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6801680c49af26fd5b561992d6767edff7f7efb6007f167b0d366f0453605bfa. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BRMCA6300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa919ed5feb881cb074ed4399a6d44c86fca9c95eb8a76f1a1933f709120481. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BREMI7200035.
Bis Bossa Nova - Um Banquinho E Um Violão - Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c60720d2ab5d990402fa4e6f30525c2378f71f81ac76e1accf2e5de4c56294. 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/BREMI7800253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9b68e4082f62ca7cd86f9ef2f78d9e5ac3423369f32cae23055cc49aad6d12. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLRD52354138.