The Weavers were an American folk music quartet based in the Greenwich Village area of New York City originally consisting of Lee Hays, Pete Seeger, Ronnie Gilbert, and Fred Hellerman. Founded in 1948
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 0x848c6fefd101ffc1d95f992dc49a9307d32d3015b377d8c6eddff2786915fc9e. 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/621e024a-9a80-486c-8bc2-5b01bcc20e2f.json and https://artists.proofprofile.net/proofs/artist/621e024a-9a80-486c-8bc2-5b01bcc20e2f.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 0xa6c5c09ce7f4913195217acee70bb5e4ce8997a79b352d9e3aaa30f77662fabb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEXO52491734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608558daac8b1c3a59d073f2ee84d3c56e235b2e7e3effa9d0bffec618038327. 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/DEUD92377239.
We Wish You A Merry Christmas (Expanded Edition)
The Weavers At Carnegie Hall: The Legendary 1955 Recording (Live)
Reunion At Carnegie Hall (Live At Carnegie Hall / New York, NY / May 2 1963)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae872cf6a4d73338ed8b443d93b994393788f5291e876e8964737784cdf4fb9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM20570470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b46bf3cef63073e42d8aa206e242faeb01870b4e660c8a554fcb0919a3f94. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USVG28709201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff64c6dde39cee4776a1b7ce0850ecd70f9d037b708c5b3bc3cd6a1322eee4c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USVG28707657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2fe344b1c876d9e4d4515e0e5b54f93d5c24274428967123c0f809f01860d7. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USVG28950432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79c08eb96b10b7af0a074619330c106e33f90da9eaf326cd967a2e202ebf1eb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USVG28906836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ca71ac9e34180c6f2a88e58f9451c17f552e32391e36eb4416b249c32ac449. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USMC15106114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71048639c07f4016d9c9052a5868f661c799e943a8087dfdaf40f27cf55e0ec8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USVG29708011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee59c2c9dd8d96154e4b08787d3a3eca22f59288cf05e1a122597d63891e370. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USVG29751243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45f0992387e17909a1e9c1c3f51024b3f48e0332eb9781afdc46c0480772c2e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USVG20185391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b546d14fa1b11b0ab023990984b580fd09d5adfe981a878a67e8ba2394c98b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:24:48Z), 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/USVG20185395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad03fa81628390c7e4396f41335bd4351fc9d91ffcd5cf34b237b3e7662c9dcb. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBHFE0510210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b2f075b5c97927e7e4e72fea5ebbb6949ae312c5d78c1141919a81893a32a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBBLY0700255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd538a6b75327171f796df6a22bde55090a3107cea7d9b3a0453ea422287684b8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:59:05Z), 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/GBLGL0906760.
Michael Row The Boat Ashore Best Of The Weavers
Classic Folk Songs - Vol. 8 - The Weavers
The Weavers At the Carnegie Hall, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b276b9766514d215457413b7ae28b24688e1283f65b9c037a5a0f9ad3ffac8f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBG5X1213607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e33fba0c4d415762f6e37d2c48b01f60b941ae0a5373fe9e910e684c40ea15. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBG5X1213616.
Go Tell It on the Mountain (The Christmas Songs)
The Diamond Collection (Original Recordings)
Quality Music 100 (100 Original Recordings Remastered)
Christmas Collection (Original Classic Christmas Songs)
Masterpieces presents The Weavers - Folk Hits & Rarities (10 Folk & Country Hits)
Top 110 Classics - The Very Best of The Weavers
Michael Row the Boat Ashore - Best of the Weavers
Anthology: The Definitive Collection (Remastered)
Travelling on with the Weavers (Reel-to-Reel Version)
Reunion at Carnegie Hall, Pt. 2 (Original Album)
Travelling On With The Weavers (Remastered 2024)
Essential Classics, Vol. 851: The Weavers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640c9f10b199651a84ef91ac53b0626f312f68ba9f9af1966d0fae661bf58244. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES31E2507181.
Where Have All The Flowers Gone: The Songs Of Pete Seeger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3673d9ee6f0345d5ce7bfffa32d4af3dac82d7b0782b0634cefb7ac29a55bbc3. 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/USASR0502420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbc56b6e0300bb6d37a4adb52bcc48f70551150de5bef9c602cfa4f42ea7f84. 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/USVG29750458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee59c2c9dd8d96154e4b08787d3a3eca22f59288cf05e1a122597d63891e370. 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/USVG29751243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a501a5d9145fc90e39ddfbfd720c26ba4b1418c9faaaf6944347776ee937463. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USVG29753099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff750bb192a97e1293b03dfa724a15383898bc37aea3f2e86b862593441a02a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CB2CY0917611.
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